Field Trip #6:
Mapping Precambrian Rocks, Llano Uplift
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I. Objectives

  • Make a geologic map of the Cambrian/Precambrian nonconformity on ranch property south of Streeter.
  • Write concise unit descriptions of each of the map units - Riley Fm., Hickory Sandstone and Calcite/Dolomite Marbles of the Packsaddle Schist.
  • Make a geologic map of folded Precambrian marble units.

II. When

  • April 26 & 27
  • We depart Saturday at 7:00 AM from the east basement door and will be back on campus by about 8:00 PM Sunday.

III. Bring  Get gear list for this trip

  • Two lunches, overnight gear
  • Compass, GPS, handlens, hammer
  • Clipboard, field book
  • Ink pens (2), colored pencils, eraser, protractor, mech. pencil, white out.

 

 

 

 

PC Llano Uplift, plutons in red
Precambrian granites (red) and host gneiss/ schist units (gray), Llano uplift.

IV. Background Material

Get map symbol key     Map symbols for this project

Last Updated August 20, 2009

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Geological Sciences
U. Texas at Austin