Field Trip 4: Mapping a Cretaceous/Precambrian Nonconformity, Llano Uplift

I. Objectives

• Determine, by mapping, the geometry of the Cretaceous/Precambrian unconformity north of Mason, TX.

• Construct a geologic map and measured section to document your findings.
   

II. When

• We depart at 7:00 AM from the east basement door and will be back on campus Sunday before 4 PM.

III. Bring only the essentials:

• Two lunches
• Camping gear (can be rented from UT RecSports)
  • sleeping bag
  • sleeping pad
  • + tent
  • nothing else
• Compass, hand lens, hammer
• Clipboard, field book
• Ink pens (2), colored pencils, eraser, protractor, mech. pencil, white out
• Water bottle, rain coat (?) and a few personal toiletry items.

Don't bring a cooler, folding chair or any other large items. Space for personal gear is extremely limited.  A one-night overnight does not require much gear or extra clothing.

Dinner Saturday and breakfast Sunday will be provided.  Please email Dr. Helper if you are a vegetarian.

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

IV. Background Material

• PowerPoint describing the local geologic setting

• Simplified Geologic Map, Llano uplift.

• Geologic Map of the Mason Area

• Geologic Map of the Mason Mt. Wildlife Management Area (WMA)

• Topographic & Geologic map of Mason Mt.

• Shaded-relief Topographic Map of Mason Mt.

• 1:10k Topographic Base Map for field mapping project

Be on time and come prepared!