Abdel-Salam, A., and Chrysikopoulos, C. V., 1994, Analytical solutions for one-dimensional colloid transport in saturated fractures: Advances in Water Resources, v. 17, p. 283-296.

Abraham, F. F., Brodbeck, D., Rafey, R. A., and Rudge, W. E., 1994, Instability dynamics of fracture: A computer simulation investigation. Physical Review Letter, v. 73, p. 272-275.

Amelinckx, S., Gevers, R., and Van Landuyt, J. (eds.), 1978, Diffraction and Imaging Techniques in Material Science, (v. 1), Imaging and Diffraction Techniques. North-Holland Publishing Company, Amsterdam, 1978.

Anderson, T. L., 1995, Fracture Mechanics: Fundamentals and Applications. CRC Press.

Anstis, G. R., Chantikul, P., Lawn, B. R., and Marshal, D. B., 1981, A critical evaluation of indentation techniques for measuring fracture toughness: 1, Direct crack measurements: Jour. American Ceramics Society, v. 64:p. 531-537.

Antonellini, M., and Aydin, A., 1994, Effect of faulting on fluid flow in porous sandstones: Petrophysical properties: Am. Assoc. Petroleum Geol. Bull., v. 78, p. 355-377.

Aris, R., 1959, On dispersion of a solute by diffusion, convection, and exchange between phases: Proc. Royal Soc., Sec. A, v. 252, p. 355-377.

Ashby, M. F., and Jones, D. R. H., 1986, Engineering Materials 2: An Introduction to Microstructures, Processing and Design. International Series on Materials Science and Technology, Pergamon Press, NY.

Ashurst, W. T., and Hoover, W. G., 1976, Microscopic fracture studies in the two-dimensional triangular lattice. Physical Review B, v. 14, p. 1465-1463.

Atkinson, B. K. (ed.), 1987, Fracture Mechanics of Rock: Academic Press, NY, 534p.

Atkinson, B. K., and Meredith, P. G., 1987, The theory of subcritical crack growth with applications to minerals and rocks: in (Atkinson, B. K., ed.), Fracture Mechanics of Rock: Academic Press, NY, p. 111-166.

Aydan, O., Shimizu, Y., and Kawamoto, T., 1996, The anisotropy of surface morphology characteristics of rock discontinuities: Rock Mech. Rock Engineering, v. 29, p. 47-59.

Balamane, H., Haliciogiu, T., and Tiller, W. A., 1992, Comparative study of silicon empirical interatomic potentials: Physical Review B, v. 46, p. 2250-2279.

Ball, W. P., and Roberts, P. V., 1991, Long-term sorption of halogenated organic chemicals by aquifer materials – Part 2. Intraparticle diffusion: Env. Science Tech., v. 25, p. 1237-1249.

Barber, L. B., 1994, Sorption of chlorobenzenes to Cape Cod aquifer sediments: Env. Science Tech., v. 28, p. 890-897.

Barenblatt, G. I., 1959, The formation of equilibrium cracks during brittle fracture: General ideas and hypothesis, axially symmetric cracks. Applied Mathematics and Mechanics, v. 23, p. 622-636. 1959.

Barenblatt, G. I., 1959, The formation of equilibrium cracks during brittle fracture: The stability of isolated cracks, relationship with energetic theories. Applied Mathematics and Mechanics, v. 23, p. 622-636.

Barenblatt, G. I., and Zheltov, I. P., 1960, Fundamental equations of filtration of homogeneous liquids in fissured rocks: Soviet Dokl. Akad. Nauk., v. 13, p. 545-548.

Barten, W., 1996, Linear response concept combining advection and limited rock matrix diffusion in a fracture network transport model: Water Res. Research, v. 32, p. 3295-3296.

Barton, N., 1973, Review of a new shear-strength criterion for rock joints: Engineering Geology 7, p. 287-332.

Barton, N., and Choubey, V., 1977, The shear strength of rock joints in theory and practice: Rock Mechanics, v. 10, p. 1-65.

Bazant, M. Z., Kaxiras, E., and Justo, J. F., 1997, Environment-dependent interatomic potential for bulk silicon: Physical Review B, v. 56, p.8542-8542.

Bear, J., Tsang, C., and de Marsily, G. (eds.), 1993, Flow and Contaminant Transport in Fractured Rock: NY, Academic Press, 560p.

Beguelin, Ph., Stalder, B., and Kausch, H. H., 1983, Application of a new velocity gage to fracture at high velocities. Int. Jour. Fracture, v. 23, p. R7-RlO.

Berding, M. A., Krishnamurthy, S., and Sher, A., 1990, Cleavage energies in semiconductors: Jour. Applied Physics, v. 67, p. 6175-6178.

Bhaduri, S. B., and Wang, F. F. Y., 1986, Fracture surface energy determination in {110} planes in silicon by the double torsion method: Jour. Materials Science, v. 21, p. 2489-2492.

Black, J. H., 1993, Hydrogeology of fractured rocks - a question of uncertainty about geometry: in Hydrogeology of Hard Rocks, Memoires, 24th Congress, Int. Assoc. Hydrogeologists (Banks, D., and Banks, S., eds.), Oslo, Norway, v. 24, part 2, p. 783-796.

Boudet, J. F., Ciliberto, S., and Steinberg, V., 1995, Experimental study of the instability of crack propagation in brittle materials: Europhysics Ltrs., v. 30, p. 337- 342.

Boudet, J. F., Ciliberto, S., and Steinberg, V., 1996 Dynamics of crack propagation in brittle materials: Jour. Physics II France, v. 6, p. 1493-1516.

Bradbury, M. H. and Green, A., 1984, Measurement of important parameters determining aqueous phase diffusion rates through crystalline rock matrices: Jour. Hydrology, v. 82, p. 39-55.

Brantley, W. A., 1972, Calculated elastic constants for stress problems associated with semiconductor devices: Jour. Applied Physics, v. 44, p. 534-535.

Brede, M., Hsia, K. J., and Argon, A. S., 1991, Brittle crack propagation in silicon single crystals: Jour. Applied Physics, v. 70, p. 758-771.

Broek, D., 1978, Elementary Engineering Fracture Mechanic: Sijthoff & Noordhoff (2^nd ed.).

Broek, D., 1989, The Practical Use of Fracture Mechanics: Kluwer Academic Publishers, Norwell. MA.

Brown, S. R., 1987, Fluid flow through rock joints: The effect of surface roughness: Jour. Geophys. Research, v. 92 (B2), p. 1337-1347.

Brown, S. R. 1987, A note on the description of surface roughness using fractal dimension: Geophys. Research Ltrs., v. 14, p. 1095-1098.

Brown, S. R., Kranz, R. L., and Bonner, B. P., 1986, Correlation between the surfaces of natural rock joints: Geophys. Research Ltrs., v. 13, p. 1430-1433.

Brown, S. R., and Scholz, C. H., 1985, Broad bandwidth study of the topography of natural rock surfaces: Jour. Geophys. Research, v. B90, p. 12575-12582.

Brown, S. R., and Scholz, C. H., 1986,Closure of rock joints: Jour. Geophys. Research, v. B91, p. 4939-4948.

Brusseau, M. L., Jessup, R. E., and Rao, P. S. C., 1991, Nonequilibrium sorption of organics: Elucidation of rate-limiting processes: Env. Science Tech., v. 25, p. 134-142.

Buck, O., Recent advances is fracture mechanics testing: in (Nair, S. V., Tien, J. K., Bates, R. C., and Buck, O., eds.) Fracture Mechanics: Microstructure and Micromechanisms, ASM International, Metals Park, OH, p. 31-86.

Carlos, B. A., Chgipera, S. J., and Bish, D. L., 1996, Distribution and Chemistry of Fracture-Lining Minerals at Yucca Mountain, Nevada: Los Alamos Nat. Lab. Rept. LA-12977-MS, 92p.

Chekuri, V. S., Tyler, S. W., and Fordham, J. W., 1995, The role of fracture coatings on water imbibition into unsaturated tuff from Yucca Mountain: Nevada Agency for Nucl. Proj./Nucl. Waste Proj. Off. Rept. NWPO-TR-024-95.

Chen, C. P., and Leipold, M. H., 1980, Fracture toughness of silicon: Amer. Ceramics Soc. Bull., v. 59, p. 469-472.

Chiou, C. T., Peters, L. J., and Freed, V. H., 1979, A physical concept of soil-water equilibria for nonionic compounds. Science, v. 206, p. 831-832.

Chiou, C. T., Porter, P. E., and Schmedding, D. W., 1983, Partition equilibria of nonionic organic compounds between soil organic matter and water: Env. Science Tech., v. 17, p. 227-231.

Chiou, C. T., Kile, D. E., and Malcolm, R. L., 1988, Sorption of vapors of some organic liquids on soil humic acid and its relation to partitioning of compounds in soil organic matter. Env. Science Tech., v. 22, 298-303.

Chiou, C. T., Lee, J.F., and Boyd, S.A., 1990, The surface area of soil organic matter: Env. Science Tech., v. 24, p. 1164-1166.

Chiou, C. T., Rutherford, D. W., and Manes, M., 1993, Sorption of N2 and EGME vapors on some soils, clays, and mineral oxides and determination of sample surface areas by use of sorption data. Env. Science Tech., v. 27, p. 1587-1594.

Choi, W. J., 1996, Physical and chemical characteristics of fracture skins: unpub. manuscript, Dept. Geol. Sciences, Univ. Texas, Austin, TX.

Chryssanthakis, P., and Barton, N., 1990. Joint roughness (JRC) characterization of a rock joint replica at lm scale in Rock Joints, Barton and Stephansson (eds.), p. 27 - 33.

Cotterell, B., 1965, Velocity effects in fracture propagation: Applied Materials Res., v. 4, p. 227-232.

Cramer, T., Wanner, A., and Gumbsch, P., 1997 Crack velocities during dynamic fracture of glass and single crystalline silicon: Physica Status Solidi, v. 164, p. R5- R6.

Crowley, K. D., 1997, Nuclear waste disposal: The Technical challenges: Physics Today, v. 50, p. 32-39.

Cudre-Mauroux, N., Kausch, H. H., Cantwell, W. J., and Roulin-Moloney, A. C., 1991, High speed crack propagation in bi-phase materials: An experimental study: Int. Jour. Fracture, v. 50, p.67-77.

Dally, J. W., 1979,Dynamic photoelastic studies of fracture: Experimental Mechanics, v. 19, p. 349-361.

Davenport, D. W., Wilcox, B. P., and Allen, B. L., 1995, Micromorphology of pedogenically derived fracture fills in Bandelier Tuff, New Mexico: Soil Sci. Soc. Am. Jour., v. 59, p. 1672-1683.

Denison, C., Carlson, W. D., and Ketcham, R. A. 1997. Three-dimensional quantitative textural analysis of metamorphic rocks using high-resolution computed X-ray tomography: Part I. Methods and techniques. Jour. Metamorphic Geology, v. 15, p. 29-44.

Devali, K., and Babadagli, T., 1998, Quantification of natural fracture surfaces using fractal geometry: Math. Geology, v. 30, p. 971-998.

Doll, W., 1973, An experimental study of the heat generated in the plastic region of a running crack in different, polymeric materials: Engineering Fracture Mechanics, v. 5, p. 259-268.

Downey, M. W., 1985, Evaluating seals for hydrocarbon accumulation: Am. Assoc. Petroleum Geologists Bull., v. 68, p. 1752-1763.

Dugdale, D. C., 1960, Yielding of steel sheets containing slits: Jour. Mechanics and Physics Solids. v. 8, p. 100-104.

Dulaney, E. N., and Brace, W. F., 1960, Velocity behavior of a growing crack. Jour. Applied Physics, v. 31, p. :2233-2266.

Dykuizen, R. C., 1992, Diffusive matrix fracture coupling including the effects of flow channeling: Water Resources Res., v. 28, p. 2447-2450.

Emren, A. T., 1993, The influence of heterogeneous rock chemistry on the sorption of radionuclides in flowing groundwater: Jour. Contaminant Hydrology, v. 13, p. 131-141.

Engelder, T. and M. P. Loading configurations and driving mechanisms for joints based on the Griffith energy-balance concept: Tectonophysics, v. 256, p. 253-277.

Evans, D. D., and Nicholson, T. J., 1987, Flow and Transport Through Unsaturated Fractured Rock: Am. Geophys. Union Monograph No. 42, Washington, D. C., 187p.

Fabryka-Martin, J. T., Wolfsberg, A., Levy, S. S., Campbell, K., Tseng, P. Roach, J. L., and Wolfsberg, L.E., 1998, Evaluation of flow and transport models of Yucca Mountain, based on chlorine-36 studies for FY98: Los Alamos Nat. Lab., Yucca Mt. Project Milestone Rept. SP33DDM4.

Ferrill, D. A., Winterle, J., Wittmeyer, G., Sims, D., Colton, S., Armstrong, A., and Morris, A. P., 1999, Stressed rock strains groundwater at Yucca Mountain, Nevada: GSA Today, v. 9, p. 1-8.

Field, J. E., 1971, Brittle fracture: Its study and application: Contemporary Physics, v. 12, p. 1-31.

Filipek, L. H. and Theobald, P. K., 1981, Sequential extraction techniques applied to a porphyry copper deposit in the Basin and Range Province: Jour. Geochemical Exploration, v. 14, p. 155-174.

Fineberg, J., Gross, S. P., Marder, M. P., and Swinney, H. L., 1991, Instability in dynamic fracture: Physical Review Letters, v. 67, p. 457-460,.

Fu, L., Milliken, K. L., and Sharp, J. M., Jr., 1994, Porosity and permeability variations in the fractured and liesegang-banded Breathitt Sandstone (Middle Pennsylvanian), eastern Kentucky: Diagenetic controls and implications for modeling dual porosity systems: Jour. Hydrology, v. 154, p. 351-381.

Fuller, C. M., and Sharp, J. M., Jr., 1992, Permeability and fracture patterns in extrusive volcanic rocks: Implications from the welded Santana Tuff, Trans-Pecos Texas: Geol. Soc. America Bull., v. 104, p. 1485-1496.

Fuller, K. N. G., Fox, P. G., and Field, J. E., 1975, The temperature rise at the tip of fast-moving cracks in glassy polymers; Proc. Royal Soc. London, v. A341, p. 537-557.

Gamerdinger, A. P., Van Rees, K. C., Rao, S. C., and Jessup, R. E., 1994, Evaluation on in situ columns for characterizing organic contaminants during transport: Env. Science Tech., v. 28, p. 376-382.

Ge, S. 1997, A governing equation for fluid flow in rough fractures: Water Res. Research, v. 33, p.53-61.

Ghandhi, S. K., 1994, VLSI Fabrication Principles: Silicon and Gallium Arsenide: John Wiley., NY.

Gilman, J. J., 1959, Cleavage, ductility and tenacity in crystals: in (Averbach, B. L., Felbeck, D. K., Hahn, G. T., and Thomas, D. A., eds.) Fracture, MIT Press, NY, Ch. 11, p. 193-224.

Gilman, J. J., 1960, Direct measurements of the surface energies of crystals. Jour. Applied Physics, v. 31, p. 2208-2218.

Glover, F.W.J., Matsuki, K., Fukima, R., and Hayashi, K. 1997, Fluid flow in fractally rough synthetic fractures: Geophys. Research Ltrs., v. 24, p. 1803-1806.

Goggin, D. J., Thrasher, R. L., and Lake, L. W., 1988, A theoretical and experimental analysis of minipermeameter response including gas slippage and high-velocity flow effects: In Situ, v. 12, p. 79-116.

Gokhale, A., and Drury, W. J., 1993, Surface roughness of anisotropic fracture surfaces: Materials Characterization, v. 30, p. 279-286.

Goltz, M. N., and Roberts, P. V., 1986, Interpreting organic solute data from a field experiment using physical nonequilibrium models: Jour. Contaminant Hydrology, v. 1, p. 77-93.

Gordon, J. E., 1976, The New Science of Strong Materials or Why You Don't Fall through the Floor (2^nd ed.): Princeton Univ. Press, Princeton. New Jersey.

Gould, P. L., 1994, Introduction to Linear Elasticity: Springer-Verlag, NY.

Griffith, A. A., 1920, The phenomena of rupture and flow in solids: Mechanical Engineering, v. A221, p. 163-198.

Grigoriev, I. S., and Meilikhov., E. Z., 1997, Handbook of Physical Quantities. CRC Press, Boca Raton, FL.

Grindrod, P., 1993, The impact of colloids on the migration and dispersal of radionuclides within fractured rock: Jour. Contaminant Hydrology, v. 13, p. 167-181.

Gross, S. P., 1995, Dynamics of Fast Fracture: unpub. Ph. D. dissertation, Univ. Texas, Austin, TX.

Gross, S. P., Fineberg, J., Marder, M. P., McCormick, W. D., and Swinney, H. L., 1993, Acoustic emissions from rapidly moving cracks. Physical Review Letters, v. 71, p. 3162-3165.

Gumbsch, P., 1995, An atomistic study of brittle fracture: Toward explicit failure criteria from atomistic modeling: Jour. Materials Research., v 10, p. :2897- 2907.

Gumbsch, P., Zhou, S. J., and Holian, B. L., 1997, Molecular dynamics investigation of dynamic crack stability; Physical Review B, v. 55, p. 3445-3455.

Hadermann, J., Roesel, F., and McCombie, C., 1985, Transport of radionuclides in inhomogeneous crystalline rocks: Materials Research Soc. Symp. Proc., v. 50, p. 655-662.

Halihan, T., Mace, R. E., and Sharp, J. M., Jr., 1997, Using laboratory scale permeability to interpret well test data in a fractured karst aquifer: Geol. Soc. America, Abs. with Programs (Ann. Mtg.), v. 29, p. A-226.

Halihan, T. (and Sharp, J. M., Jr.), 1998, Multiscale estimation of permeability in fractured aquifers [abs.]: EOS, v. 79, no, 17, p. S-84.

Hall, E. O., 1953, The brittle fracture of metals. Jour. Mechanics and, Physics Solids, v. 1, p. 227-233.

Hastings, Harold M., 1993. Fractals: A User's Guide For The Natural Sciences: Oxford University Press, NY.

Hauch, J. A., and Marder, M. P., 1998, Energy balance in dynamic fracture investigated by a potential drop technique: Int. Jour. Fracture, v. 90, p. 133.

Heiken, G. H., 1996, Preliminary Report on: A Workshop on Tuffs; Los Alamos Nat. Lab., unpub report, 22p.

Herman, G.T., 1980, Image Reconstruction from Projections: The Fundamentals of Computerized Tomography. NY: Academic Press, 316 pp.

Hiebert, F. and Bennett P. C., 1992, Microbial control of silicate weathering in organic-rich ground water: Science, v. 258, p. 278-281.

Hinedi, Z. R., Johnston, C. T., and Erickson, C., 1993, Chemisorption of benzene and Cu-mont-morillonite as characterized by FTIR and ¹³C MAS NMR: Clays & Clay Minerals, v. 41, p. 87-94.

Holian, B. L., Blumenfeld, R., and Gumbsch, P., 1997, An Einstein model of brittle crack propagation: Physical Review Letters, v. 78, p. 78-81.

Holland D., and Marder, M. P., 1998, Ideal brittle fracture of silicon studied with molecular dynamics. Physical Review Letters, v. 80, p. 746-749.

Holloway, J. W., and Johnson, D. G., 1968,Microstructure of the mist zone on glass fracture surfaces: Philosophical Magazine, v. 17, p. 899-910.

Holtta, P., Siitari-Kauppi, M., Hakanen, M., and Hautojarvi, A., 1993, Radionuclide migration studies on tonalite: Materials Research Soc. Symp. Proc., v. 294, p. 803-810.

Huang, Y. M., Spence, and Adams, G. B., 1991, The influence of internal surfaces on the (21) shuffle and glide cleavage reconstructions for Si (111). Surface Science, v. 256, p. 344-353.

Hull, D., 1970, Effect of crazes on the propagation of cracks in polystyrene. Jour. Materials Science, v. 5, p. 357-363.

Inglis, C. E., 1913, Stresses in a plate due to the presence of cracks and sharp corners: Trans. Inst. Nav. Arch.

INSPEC, 1988, Properties of Silicon: Inst. Electrical Engineers.

Irwin, G. R., 1960, Fracture mechanics: in (Goodier, J. N., and Hoff, N. J., eds.) Structural Mechanics, Pergamon Press, Elmsford, NY, p. 557-591.

Irwin, G. R., Dally, J. W., Kobayashi. T., Fourney, W. L., Etheridge, M. J., and Rossmanith, H.-P., 1979, On the determination of the a-k relationship for birefringent polymers: Experimental Mechanics, v. 19, p. 121-128.

Jaccodine, R. J., 1963, Surface energy of germanium and silicon: Jour. Electrochemical Soc., v. 110, p. 524-527.

Jacobi, R. D., and Xu, J., 1998, Fracture intensification domains as fault indicators: Geol. Soc. America, Abs. with Programs (Ann. Mtg.), v. 30, p. 63.

Johansson, S., 1988, Acta Universitatis Upsaliensis: unpub. Ph. D. thesis. Uppsala Univ.

Johnson. E., 1992, Process region changes for rapidly propagating cracks: Int. Jour. Fracture, v. 55, p. 47-63.

Jorgensen, P. R., McKay, L. D., and Spliid, N. H., 1998,Evaluation of chloride and pesticide transport in a fractured clayey till using large undisturbed columns and numerical modeling: Water Res. Research, v. 34, p. 539-553.

Kalthoff, J. F., Beinert, J., and Winkler, S., 1977, Measurements of dynamic stress intensity factors for fast running cracks in double-cantilever-beam specimens: in (Hahn, G. T., and Kanninen, M. F., eds.) Fast Fracture and Crack Arrest, American Soc. Testing and Materials, p. 161-176.

Kanninen M. F., and Popelar, C. H., 1985, Advanced fracture mechanics: Oxford Univ. Press, NY.

Karickhoff, S. W., Brown, D. S, and Scott, T. A., 1979, Sorption of hydrophobic pollutants on natural sediments: Water Res. Research, v. 13, p. 241-248.

Kerkhof, F., 1973, Wave fractographic investigations of brittle fracture dynamics: in (Sih, G. C., ed.), Dynamic Crack Propagation, Noordhoff International Publishing, Leyden, p. 3-29.

Kittel, C., 1986, Introduction to Solid State Physics (6^th ed.): John Wiley, NY.

Knauss, W.C., and Ravi-Chandar, K., 1985, Some basic problems in stress wave dominated fracture: Int. Jour. Fracture, 27:127-143, 1985.

Kobayashi, A., Ohtani, N., and Sato, T., 1974, Phenomenological aspects of viscoelastic crack propagation: Jour. Applied Polymer Science, v. 18, p. 1625-1638.

Kobayashi, A. S., (ed.), 1993, Handbook on Experimental Mechanics (2^nd ed.): VCH Publishers, NY.

Kobayashi, A. S., and Mall, S., 1978, Dynamic fracture toughness of Homalite-100: Experimental Mechanics, v. 18, p. 11-18.

Kobayashi, T., and Dally, J. W., 1979, Relation between crack velocity and the stress intensity factor in birefringent polymers: in (Hahn, G. T., and Kanninen, M. F., eds.) Fast Fracture and Crack Arrest, Amer. Soc. Testing and Materials. Philadelphia, p. 7-18.

Kobayashi, T., and Dally, J. W., 1979, Dynamic photoelastic determination of the a - k relation for 4340 steel: in (Hahn, G. T., and Kanninen, M. F., eds.) Fast Fracture and Crack Arrest, Amer. Soc. Testing and Materials. Philadelphia, p. 189-210.

Kohl, T., Evans, K. F., Hopkirk, R. J., Jung, R. and Rybach, L., 1998, Observations and simulation of non-Darcian flow transients in fractured rock: Water Res. Research, v. 33, p. 407-418.

Kookana. R. S., Schuller, R. D., and Aylmore, L. A. G., 1993, Simulation of simazine transport through soil columns using time dependent sorption data measured under flow conditions: Jour. Contaminant Transport, v.14, p.93-115.

Kreisel, I., and Sharp, J. M., Jr., 1996, Fracture skins in the Brushy Canyon Formation: in The Brushy Canyon Play in Outcrop and Subsurface: Concept and Examples (eds., W. D. DeMis and A. G. Coles), Permian Basin Section SEPM Pub. 96-38, p. 147-152.

Kutilake, P. H. S., Um, J., and Pan, G., 1997, Requirements for accurate estimation of fractal parameters for self-affine roughness profiles using the line scaling method, Rock Mech. Rock Engineering, v. 30, p. 181-206.

Lagarde, A. (ed.), 1987, Static and Dynamic Photoelasticity and Caustics: Springer-Verlag, NY.

Lamb, Horace, 1932, Hydrodynamics (6th edition): Dover Publications, NY, 738p.

Landrum, M. T., 1997, Diffusion coefficients in a sandstone: Comparison of fracture skins and matrix samples: Geol. Soc. America, Abs. with Programs (South-Central Sec.), v. 29, p. 19.

Landrum, M. T., 1999, Hydrologic properties of fracture skins and implications for solute transport in fractured double-porosity systems: Univ. Texas, unpub. ms.,16p.

Landau, L.D., and Lifshitz, E. M., 1959, Theory of Elasticity. Pergamon Press, Elmsford, NY.

La Pointe, P. R., 1988, A method to characterize fracture density and connectivity through fractal geometries: Int. Jour. Rock Mechanics and Mining Science, v. 25, p. 421.

Lawn, B., 1975, Fracture in Brittle Solids (2^nd ed.): Cambridge Univ. Press, Cambridge.

Lee, Y. H., Carr, J. R., Barr, D. J., and Haas, C. J., 1990. The fractal dimension as a measure of the roughness of rock discontinuity profiles: Int. Jour. Rock Mechanics and Mining Sciences & Geomechanics Abstracts, v. 27, No. 6, pp. 453-464.

Lee, Y. H., Carr, J. R., Barr, D. J., and Haas, C. J., 1990, The fractal dimension as a measure of roughness of rock discontinuity profiles: Int. Jour. Rock Mechanics and Mining Sciences & Geomechanics Abstracts, v. 27, p. 453-464.

Liu, B., Fabryka-Martin, J., Wolfsberg, A., Robinson, B., and Sharma, P., 1995, Significance in apparent discrepancies in water ages derived from atmospheric radionuclides at Yucca Mountain, Nevada: Los Alamos Nat. Lab. Rept. LA-UR-95-772.

Liu, X., and Marder, M. P., 1991, The energy of a steady-state crack in a strip: Journal Mechanics and Physics Solids, v. 39, p. 947-961.

Lomize, G. M., 1951, Flow in Fractured Rocks [in Russian]: Gosenergoizdat, Moscow, 127p.

Louis, C., 1969, A study of groundwater flow in jointed rock and its influence on the stability of rock masses: Rock Mech. Res. Rept. 10, Imperial College, London, 90p.

Love, A. E. H., 1944, A Treatise on the Mathematical Theory of Elasticity (4^th ed.): Dover Pubs., NY.

Lung, C. W. and Zhang, S. Z., 1989, Fractal dimension of the fractured surface of materials: Physica D. v. 38, p. 242-245.

Mace, R. E., 1998, Ground-Water Flow and Solute Transport in a Fractured Chalk Outcrop: unpub. Ph. D. dissertation, Univ. Texas, Austin, TX, 387p.

Mace, R. E., and Sharp, J. M., Jr., 1998, Back diffusion in fractured rocks [abs.]: EOS, v. 77, p. S108.

MacIntyre, W. G., Stauffer, T. B., and Antworth, C. P., 1991, A comparison of sorption coefficients by batch, column, and box methods on a low organic carbon aquifer material: Ground Water, v. 29, p. 908-913.

Mahler, B. J., Bennett, P. C., and Zimmerman, M. D., 1998, Lanthanide clays for use in characterizing sediment transport: Ground Water, v. 36, p. 835-843.

Manogg, P., 1966, Investigation of the rupture of a Plexigiass plate by means of an optical method involving high speed filming of the shadows originating around holes drilled in the plate: Int. Jour. Fracture, v. 2, p. 604-613.

Marder, M. P., 1993, Simple models of rapid fracture: Physica D, v. 6, p. 125-134.

Marder, M. P., 1996, Energetic developments in fracture: Nature, v. 381, p. 275-276.

Marder, M. P., and Fineberg, J., 1996, How things break: Physics Today, p. 24-29.

Marder, M. P., and Gross, S. P., 1994, Origin of crack tip instabilities: Jour. Mechanics and Physics Solids, v. 43, p. 1-48.

Marder, M. P., and Liu, X., 1993, Instability in lattice fracture: Physical Review Ltrs., v. 71, p. 2417-2420.

Marrett, R., 1996, Aggregate properties of fracture populations: Jour. Structural Geology, v. 18, p. 169-178.

Maloszewski, P., Herrmann, A., and Zuber, A., 1999, Interpretation of tracer tests performed in fractured rock of the Lange Bramke basin, Germany: Hydrogeology Jour., v. 7, p. 209-218.

Mandlebrot, B. B., 1983. The Fractal Geometry of Nature, W. H. Freeman, NY, 468p.

Mazurek, M., Alexander, W. R., and Mackenzie, A. B., 1996, Contaminant retardation in fractured shales: matrix diffusion and redox front entrapment: Jour. Contaminant Hydrology, v. 21, p. 71-84.

Mayer, L.M., 1994, Surface area control of organic carbon accumulation in continental shelf sediments. Geochim. Cosmochim. Acta, v. 58, 1271-1284.

McClintock, F. A., and Argon, A. S., 1966, Mechanical Behavior of Materials: Addison-Wesley, NY.

McCullough, E. C., 1975, Photon attenuation in computed tomography: Med. Physics, v. 2, p. 789-792.

Messmer, C. and Bilello, J. C., 1981, The surface energy of Si, GaAs, and GaP: Jour. Applied Physics, v. 52, p. 4623-4629.

Michot, G., 1987, Propagation of {110} cleavage cracks in silicon: Surface Science Ltrs., v. 186, p. L561-L567.

Michot, G., 1988, Fundamentals of silicon fracture: Crystal Properties & Preparation, v. 17-18, p. 55-98.

Michot, G., Badawi, K., Abd El Halim, A. R., and George, A., 1980, X-ray topographic study of crack-tip dislocation patterns in silicon: Philosophical Magazine, v. 42, p. 195-215.

Miller , C. T., and Weber, W. J., 1988, Modeling the sorption of hydrophobic contaminants by aquifer materials: II - Column reactor series: Water Res. Research, v. 22, p. 465-474.

Miller, S. M., McWilliams, P. C., and Kerkering, J. C., 1990. Ambiguities in estimating fractal dimensions of rock fracture surfaces in Proceedings – 31st Symp. Rock Mechanics, p. 471-478.

Moench, A. F., 1984, Double-porosity models for a fissured groundwater reservoir with fracture skin: Water Res. Research, v. 20, p. 831-846.

Moench, A. F., 1995, Convergent radial dispersion in a double-porosity aquifer with fracture skin: Analytical solution and application to a field experiment in fractured chalk: Water Res. Research, v. 31, p. 1823-1835.

Moreno, L., Tsang, Y.W., Tsang, C.F., Hale, F.V. and Neretnieks, I., 1988, Flow and tracer transport in a single fracture: A stochastic model and its relation to some field observations: Water Res. Research, v. 24, p. 2033-2048.

Mueller, H. K., and Knauss, W. G., 1971, Crack propagation in a linearly viscoelastic strip. Jour. Applied Mechanics – Trans., ASME, v. 38, p. 483-488.

Muuronen, S. Kamaraainen, E. L., Jaakola, T., Pinnioja, S., and Lindberg, A., 1985, Sorption and diffusion of radionuclides in rock matrix and natural fracture surfaces studied by autoradiography: Materials Research Soc. Symp. Proc., v. 50, p. 747-754.

Maerz, N. H., Franklin, J. A., and Bennett, C. P., 1990. Joint roughness measurements using shadow profilometry: Int. Jour. Rock Mechanics and Mining Sciences & Geomechanics Abstracts, v. 27, p. 329-343.

Myers, N. O., 1962. Characterization of surface roughness, Wear, 5, pp. 182-189

Nakamura, T., and Parks, D. M., 1988, Three-dimensional stress field near the crack front of a thin elastic plate: Jour. Applied Mechanics, v. 55, p. 805-813.

National Research Council, 1996, Rock Fractures and Fluid Flow: National Academy Press, Washington, D. C., 551p.

Nativ, R., Adar, E., Dahan, O., and Geyh, M., 1995, Water recharge and solute transport through the vadose zone of fractured chalk under desert conditions: Water Res. Research, v. 31, p. 253-261.

Neretnieks, I., 1983, A note on fracture flow dispersion mechanisms in the ground: Water Res. Research, v. 19, p. 364-370.

Neretnieks, I., 1993, Solute transport in fractured rock—applications to radionuclide waste repositories: in (Bear, J., Tsang, C., and de Marsily, G., eds.) Flow and Contaminant Transport in Fractured Rock: NY, Academic Press, p. 39-128.

Nkedi-Kizza, P., Brusseau, M. L., Rao, P. S. C., and Hornsby, A. G., 1989, Nonequilibrium sorption during displacement of hydrophobic organic chemicals and ⁴⁵Ca through columns with aqueous and mixed solvent: Env. Science Tech., v. 23, p. 814-820.

Noble, B., 1958, Methods based on, the Wiener-Hopf Technique for the Solution of Partial Differential Equations: Pergamon Press, NY

Novak, C. F., 1993, Transport modeling in a fractured rock domain: Materials Research Soc. Symp. Proc., v. 294, p. 831-838.

Novakowski, K. S., Evans, G.V., Lever, D. A. and Raven, K.G., 1985, A field example of measuring hydrodynamic dispersion in a single fracture: Water Res. Research, v. 21, p. 1165-1174.

Odling, N. E., 1994, Natural fracture profiles, fractal dimension and joint roughness coefficients: Rock Mech. Rock Engineering, v. 27, p. 135-153.

Orowan, E., 1955, Energy, criteria of fracture. Weld. Res. Supp.

Parton, V. Z., 1994, Static and Dynamic Fracture Mechanics: Computational Mechanics Pubs., Boston, Ch. 4 (Dynamic fracture mechanics).

Persky, K., 1999, Comparison and application of fracture roughness characterization methods: Univ. Texas, unpub. ms., 13p.

Pirhonen, V. O., Front, K., and Pitkanen, P., 1991, Diffusion, porosity, and diffusivity of radionuclides in granitic rocks. Part I: Diffusion interfaces around permeable fractures: Materials Research Soc. Symp. Proc., v. 212, p. 649-654.

Power, W. L., and Tullis, T. E., 1991, Euclidean and fractal models for the description of rock surface roughness, Jour. Geophys. Research, B, Solid Earth and Planets, 1, p. 415-425.

Power, W. L., Tullis, T. E., Brown, S. R., Boitnott, G. N. and Scholz, C. H., 1987. Roughness of natural fault surfaces: Geophys. Research Ltrs, v. 14, p. 29-32.

Pusch, R., 1995, Rock Mechanics on a Geological Base: Developments in Geotechnical Engineering, v. 77, Elsevier, Amsterdam, 498p.

Rasmuson, A., 1984, Migration of radionuclides in fissured rock: Analytical solutions for the case of constant source strength: Water Resources Res., v. 20, p. 1435-1442.

Rasmuson, A., and Neretnieks, I., 1986a, Radionuclide migration in strongly fissured zones: The sensitivity to assumptions and parameters: Water Resources Res., v. 22, p. 559-569.

Rasmuson, A., and Neretnieks, I., 1986b, Radionuclide transport in fast channels in crystalline rock: Water Res. Research, v. 22, p. 1247-1256.

Raven, K. G., Novakowski, K. S., and Lapcevic, P. A., 1988, Interpretation of field tracer tests of a single fracture using a transient solute storage model: Water Res. Research, v. 24, p. 2019-2032.

Ravi-Chandar, K., and Knauss, W. G., 1982, Dynamic crack-tip stress under stress wave loading-a comparison of theory and experiment: Int. Jour. Fracture, v. 20, p. 209-222.

Ravi-Chandar, K., and Knauss, W. G.,1984 An experimental investigation into dynamic fracture: I. Crack initiation and arrest: Int. Jour. Fracture, v. 25, p. 247-262.

Ravi-Chandar, K., and Knauss, W. G., 1984, An experimental investigation into dynamic fracture: II. Microstructural aspects: Int. Jour. Fracture, v. 26, p. 65-80.

Ravi-Chandar, K., and Knauss, W. G., 1984, An experimental investigation into dynamic fracture: III. On steady-state crack propagation and crack branching: Int. Jour. Fracture, v. 26, p. 141-154.

Ravi-Chandar, K., and Knauss, W. G., 1984, An experimental investigation into dynamic fracture: IV. On the interaction of stress waves with propagating cracks. Int. Jour. Fracture, 26, p. 189-200.

Rice, J. C., and W. G. Knauss, W. G., 1967 ",discussion": Jour. Applied Mechanics – Trans. ASME, v. 89, p. 249-250.

Roberson, J. A., and Crowe, C. T., 1993, Engineering Fluid Mechanics (5^th ed.):Houghton Mifflin, Boston, MA, 785p.

Roberts, P. V., Goltz, M. N., and Mackay, D. M., 1986, A natural gradient experiment on solute transport in a sand transport: III. Retardation estimates and mass balance of organic solutes: Water Res. Research, v. 22, p. 2047-2058.

Robinson, N. I., and Sharp, J. M., Jr., 1997, Analytical solution for solute transport in a finite set of parallel fractures with matrix diffusion: C.S.I.R.O. Mathematical and Information Sciences, Report CMIS-C23, 22p.

Robinson, N. I., Sharp, J. M., Jr., and Kreisel, I., 1998, Contaminant transport in sets of parallel finite fractures with fracture skins: Jour. Contaminant Hydrology, v. 31, p. 83-109.

Rom, Evgenii S., 1966, Fil’tratsionnye svoista treshchinovatykh gornykh prod: "Nedra" Publishing House, Moscow. [Fluid Flow in Fractured Rocks (trans., 1972 by Blake, W. R.): Phillips Petroleum Company, Bartlesville, OK], 375p.

Schardin, H., Mucke, L., Struth, W., and Rhein, W. A., 1955, Cracking velocity of glasses: The Glass Industry, v. 36, p. 133-138.

Schwarzenbach, R. P., Gschwend, P. M., and Imboden, D. M., 1993, Environmental Organic Chemistry: John Wiley & Sons, NY, 681p.

Schwarzenbach, R. P., and Westall J., 1981, Transport of nonpolar organic compounds from surface water to groundwater: Laboratory sorption studies: Env. Science Tech., v. 15, p. 1360-1367

Seidel, J. P., and Haberfield, C. M., 1995, The application of energy principles to the determination of sliding resistance of rock joints: Rock Mech. Rock Engineering, v. 28, p. 211-226.

Seidel, J. P., and Haberfield, C. M., 1995, Towards an understanding of joint roughness: Rock Mechanics and Rock Engineering, v. 28, p. 69-92.

Shapiro, A.M. and Nicholas, J. R., 1989, Assessing the validity of the channel model of fracture aperture under field conditions: Water Res. Research, v. 25, p. 817-828.

Sharon, E., Gross, S. P., and Fineberg, J., 1995, Local crack branching as a mechanism for instability. in dynamic fracture: Physical Review Ltrs., v. 74, p. 5146-5154.

Sharon, E., Gross, S. P., and Fineberg, J., 1996, Energy dissipation in dynamic fracture. Physical Review Ltrs., v. 76, p. 2117-2120.

Sharp, J. M., Jr., 1993, Fractured aquifers/reservoirs: Approaches, problems, and opportunities: in Hydrogeology of Hard Rocks, Memoires 24th Congress, Int. Assoc. Hydrogeologists (Eds. Banks, D., and Banks, S.), Oslo, Norway, v. 24, part 1, p. 23-38.

Sharp, J. M., Jr., 1997, Fracture skins and their effects on transport in fractured rock and dual-porosity systems [abs.]: in Advances in Ground-Water Hydrology, A Decade of Progress (eds., Watson, K. W., and Zaporozec, A. A.), American Inst. Hydrology, St. Paul, MN, p. 98.

Sharp, J. M., Jr., Fu, L., Cortez, P., and Wheeler, E., 1994, An electronic minipermeameter for use in the field and laboratory: Ground Water, v. 32, p. 41-46.

Sharp, J. M., Jr., Kreisel, I. Milliken, K. L., Mace, R. E., and Robinson, N. I., 1996, Fracture skin properties and effects on solute transport: Geotechnical and environmental implications: Proc., 2^nd North America Rock Mechanics Symp., Montreal, v. 2, p. 1329-1336.

Sharp, J. M., Jr., Mace, R. E., Zimmerman, M. D. D, Landrum, M. T., and Bennett, P. C., 1997, Effects of diffusion and sorption on solute in double porosity systems with fracture skins [abs.]: EOS, v. 78, p. 138.

Sharp, J. M., Jr., Robinson, N. I., Smyth-Boulton, R. C., and Milliken, K. L., 1995, Fracture skin effects in groundwater transport: in Mechanics of Jointed and Faulted Rock (ed. Rossmanith, H.-P.), A. A. Balkema, Rotterdam, p. 449-454.

Sharp, J. M., Smyth-Boulton, R. C., and Fuller, C. M.,1993, Permeability-porosity variations and fracture patterns in tuffs: in Hydrogeology of Hard Rocks, Memoires, 24th Congress, Int. Assoc. Hydrogeologists (Eds. Banks, D., and Banks, S.), Oslo, Norway, v. 24, part 1, p. 103-114.

Sinclair, J. E., 1975, The influence of the interatomic force law and of kinks on the propagation of brittle cracks: Philosophical Magazine, v. 31, p. 647-671.

Sinclair, J. E., and Lawn, B. R., 1972, An atomistic study of cracks in diamond-structure crystals. Proc. Royal Society A. v. 329, p. 83-103.

Skagius, K., and Neretnieks, I., 1985, Diffusivities in crystalline rock materials: Materials Research Soc. Symp. Proc., v. 50, p.73-80.

Skagius, K., and Neretnieks, I., 1986, Porosities and diffusivities of some nonsorbing species in crystalline rocks: Water Res. Research, v. 22, p. 389-398.

Slepyan, L. I., 1981, Dynamics of brittle fracture in a lattice. Doklady Soviet Phys., v. 26, p.538-540.

Soll, W., and Birdsell, K., 1998, The influence of coatings and fills on flow in fractured, unsaturated tuff porous media: Water Res. Research., v. 34, p. 193-202.

Southworth, G. R., and Keller, J. L., 1986, Hydrophobic sorption of polar organics by low organic carbon soils: Water, Air and Soil Pollution, v. 28, p. 239-248.

Spence, J. C. H., Huang, Y. M., and Sankey, O., 1993, Lattice trapping and surface reconstruction for silicon cleavage on (111) - AB-INITIO quantum molecular dynamics calculations: Acta Metallurgica et Materialia. v. 41, p. 2815-2824.

Stalder. B., Beguelin, P., and Kausch, H. H., 1983, A simple velocity gauge for measuring crack growth. Int. Jour. Fracture, v. 22, p. R47-R54.

Stalder, B., Beguelin, P., Roulin-Moloney, A. C., and Kausch, H. H., 1989, The graphite gauge and its application to the measurement of crack velocity: Jour. Materials Science, v. 24, p. 2262-2274.

Stalder, B., and Kausch, H. H., 1985, The use of a velocity gauge in impact testing of polymers: Jour. Materials Science, v. 20, p. 2873-2881.

Stillinger, F. H., and Weber, T. A., 1985, Computer simulation of local order in condensed phases of silicon: Physical Review B, v 31, p. 5262-5271.

St. John, C., 1975, The brittle-to-ductile transition in pre-cleaved silicon single crystals: Philosophical Magazine, v. 32, p. 1195-1212.

Streltsova, T. D., 1976, Hydrodynamics of groundwater flow in a fractured formation: Water Res. Research, v. 12, p. 405-414.

Stroh, A. N., 1957. A theory of the fracture of metals: Philosophical Magazine, v. 6, p. 418-465.

Su, W. G., Geller, J. T., Pruess, K., and Wen, F., 1999, Experimental studies of water seepage and intermittent flow in unsaturated, rough-walled fractures: Water Res. Research, v. 35, p. 1019-1037.

Sudicky, E. A., and Frind, E. O., 1982, Contaminant transport in a fractured porous medium: Analytical solutions for a system of parallel fractures: Water Res. Research, v. 18, p. 1634-1642.

Sudicky, E. A., and Frind, E. O., 1984, Contaminant transport in a fractured porous medium: Analytical solution for a 2-member decay chain in a single fracture: Water Res. Research, v. 18, p. 1634-1642.

Tang, D. H., Frind, E. O., and Sudicky, E. A., 1981, Contaminant transport in a fractured porous media: Analytical solution for a single fracture: Water Resources Res., v. 17, p. 555-564.

Taylor, G. I., 1953, Dispersion of soluble matter in a solvent flowing through a tube: Proc. Royal Soc., Sec. A, v. 219, p 186-205.

Theocaris, P. S., and Gdoutos, E. E., 1972, An optical method for determining opening-mode and edge sliding-mode stress-intensity factors: Jour. Applied Mechanics, v. 39, p. 91.

Thoma, S. G., Gallegos, D. P., and Smith, D. M, 1992, Impact of fracture coatings on fracture/matrix interactions in unsaturated, porous media: Water Res. Research, v. 28, p. 1357-1367.

Thomson, R., Hsieh, C., and Rana, V., 1971, Lattice trapping of fracture cracks: Jour. Applied Physics, v. 42, p. 3154-3160.

Thorbjarnarson, K.W. and Mackay, D. M., 1994, A forced-gradient experiment on solute transport in the Borden aquifer 3. Nonequilibrium transport of the sorbing organic compounds: Water Res. Research, v. 30,p. 401-419.

Thurman, E. M., 1985, Organic Geochemistry of Natural Waters: Martinus Nijhoff, Boston.

Tipper, C. F., 1962, The brittle fracture Story: Cambridge Univ. Press, London.

Tsai, Y. L., and Mecholsky, J. J., 1991, Fractal fracture of single crystal silicon: Jour. Materials Research, v. 6, p. 1248-1263.

Tsang, Y. W., and Tsang, C.-F., 1987, Channel model of flow through fractured media: Water Res. Research, v. 23, p. 467-479

Tsang, Y.W., Tsang, C.-F., Neretnieks, I., and Moreno, L., 1988, Flow and transport in fractured media: A variable aperture channel model and its properties: Water Res. Research, v. 24, p. 2049-2060.

Tsang, Y. W., and Witherspoon, P. A., 1983, The dependence of fracture mechanical and fluid flow properties of fracture roughness and sample size: Jour. Geophys. Research. v. 88, no. B3, p. 2359-2366.

Tse, R., and Cruden, D. M., 1979, Estimating joint roughness coefficients: Int. Jour. Rock Mechanics and Mining Sciences & Geomechanies Abstracts, v. 16, p. 303-307.

Turcotte, D. L., 1989, Fractals in geology and geophysics: Pageoph. v. 131, p. 171-196.

Uliana, M. M., 1998, Methods of measuring and characterizing fracture roughness: Univ. Texas, unpub. ms., 12p.

Valocchi, A. J., 1985. Validity of the local equilibrium assumption for modeling sorbing solute transport through homogeneous soils. Water Res. Research, v. 21, p. 808-820.

Vandergraaf, T. T., Drew, D. J., Achambault, D., and Ticknor, K. V., 1997, Transport of radionuclides in natural fractures: some aspects of laboratory migration experiments: Jour. Contaminant Hydrology, v. 26, p. 83-95.

Van Olphen, H. and Fripiat, J. J., 1979, Data Handbook for Clay Materials and Other Non-Metallic Minerals: Pergamon Press, NY, NY, 345p.

Voice, T. C., and Weber, W. J. Jr., 1983, Sorption of hydrophobic compounds by sediments, soils and suspended solids - I theory and background: Water Res. Research v. 17, p. 1433-1441.

Walsh, J. B. and Grosenbaugh, M. A., 1979. A new model for analyzing the effect of fractures on compressibility, Jour. Geophys. Research, 84, pp. 3532-3536.

Wang, X. M, and Kim, H. S., 1993, Continuous measurement of crack growth in plastics. Jour. Materials Science Letters, v. 12, p. 357-358.

Ward, I. M., and Hadley, D. W., 1993, An Introduction to the Mechanical Properties of Solid Polymers: John Wiley, NY.

Warren, J. E., and Root, P. J., 1963, The behavior of naturally fractured reservoirs: Trans., Soc. Petrol. Engineers, v. 3, p. 245-255.

Wellington, S. L. & Vinegar, H.J., 1987, X-ray computerized tomography: Jour. Petroleum Tech., v. 8, p. 885-898.

Wels, C., and Smith, L., 1994, Retardation of sorbing solutes in fractured media: Water Res. Research, v. 30, p. 2547-2563.

Wels, C., Smith, L., and Vandergraaf, T. T., 1996 Influence of specific surface area on transport of sorbing solutes in fractures: An experimental analysis: Water Res. Research, v. 32, p. 1943-1954.

Weichert, R., and Schonert, K., 1974, On the temperature at the tip of a fast running crack: Jour. Mechanics and Physics Solids, v. 22, p. 127-133.

Weimer, R. J., and Rogers, H. C., 1977, A high-speed digital technique for precision measurement of crack velocities: in (Hahn, G. T., and Kanninen, M. F., eds.) Fast Fracture and Crack Arrest, Am. Soc. Testing and Materials, p. 359-371.

Wise, W.R., 1993, Effects of laboratory-scale variability upon batch and column determinations of nonlinearly sorptive behavior in porous media: Water Res. Research, v. 29, p. 2983-2992.

Witherspoon, P.A., Wang, J.S.Y., Iwai, K. and Gale, J.E., 1980, Validity of cubic law for fracture flow in a deformable rock fracture: Water Res. Research, v. 16, p. 1016-1024.

Wittke, W., 1973, General report on the symposium "Percolation Through Fissured Rocks": Bull. Int. Assoc. Engineering Geologists, p. 3-28.

Williams, R. E., and Farvolden, R. N., 1967, The influence of joints on the movement of water through glacial till: Jour. Hydrology, v. 5, p. 163-170.

Xin, Y., and Hsia, H. J., 1995, A technique to generate straight through thickness surface cracks and its application to studying dislocation nucleation in Si: Acta Materialia, v. 44, p. 845-853.

Xin, Y., Hsia, K. J., and Lange, D. A., 1995, Quantitative characterization of the fracture surface of Si single crystals by confocal microscopy: Jour. Amer. Ceramics Soc., v. 78, p. 3201-3208.

Xu, X. P., and Needleman, A., 1994, Numerical simulations of fast crack growth in brittle solids: Jour. Mechanics and Physics Solids, v. 42, p. 1397-1434.

Yasutake, K., Iwata, M., Yoshii, K., and Kawabe, H., 1986, Crack healing and fracture strength of silicon. Jour. Materials Science, v. 21, p. 2185-2192.

Yoffe, E. H., 1951, The moving Griffith crack: Philosophical Magazine, v. 42, p. 739-750.

Young, D.F. and Ball, W. P., 1995, Effects of column conditions on the first-order rate modeling of nonequilibrium breakthrough: Water Res. Research, v. 31, p. 2181-2192.

Yueng and Chang, 1990, Shear strength of jointed profiles: in Proc., 31^st Symposium on Rock Mechanics, p 471 - 478.

Zahm, C. K., Marrett, R., and Sharp, J. M., Jr., 1998, Prediction of regional groundwater flow and permeability using fractured outcrop exposures, Edwards aquifer, central Texas: in Gambling with Ground Water – Physical, Chemical, and Biological Aspects of Aquifer-Stream Relations (eds., Brahana, J. V., Eckstein, Y., Ongley, L. K., Schneider, R., and Moore, J. E.), Proc., Joint Mtg. Am. Inst. Hydrology and XXVIII Congress I. A. H., Las Vegas, p. 697-705.

Zimmerman, M. D., 1997, Sorption in a Model Fracture System: unpub. M. S. thesis, Dept. Geological Sciences, Univ. Texas, Austin, TX, 112p.

Zimmerman, M. D., Bennett, P. C., and Sharp, J. M., Jr. 1997, Experimental determination of sorption in fractured rock flow systems [abs.]: EOS, v. 78, p. F274.

Zimmerman, M. D., Bennett, P. C., Sharp, J. M., Jr., and Choi, W. J., unpub., Experimental determination of sorption in a fractured rock flow system: submitted to Jour. Contaminant Hydrology.

Zimmerman, C., Klemm, W., and Schonert, K., 1984, Dynamic energy release rate and fracture energy in Polymethylmethacrylate (PMMA) and a high strength steel: Engineering Fracture Mechanics, v. 20, p. 777-782.