| E. F. McBride Geo. 420K Spring, 2000
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| PROCESS | WHAT | WHY | HOW RECOGNIZED |
| Transgression | Landward migration of shoreline | Rise in SL; subsidence | Upward deepening facies |
| Regression | Seaward migration of shoreline | Lowered SL; basin uplift | Upward shallowing facies |
| Progradation | Sediment interface moves seaward | Deposition rate exceeds dispersal | Upward shallowing facies |
| Erosion (degradation) | Erosion | Removal of sediment | Scour surface; missing fossils |
efmcbride@mail.utexas.edu
Geological Sciences
U. Texas at Austin