Austin Geological Society
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(Unless otherwise noted)

Building 130: The Bureau of Economic Geology
10100 Burnet Road
Austin, Texas 78758


Austin Geological Society
P.O. Box 1302
Austin, TX

Email Contact:

The Austin Geological Society Mission:

  • to stimulate interest in and promote advancement of geology;
  • to facilitate discussion and dissemination of geologic information;
  • to encourage social and professional cooperation among geologists and associated scientists;
  • to enhance public understanding of the professional activities of the members.

Upcoming Meetings & Events

Dec 5th, 2015 (Sat)
8:45 AM - 1:00 PM
  AGS Informal Field Trip to Bright Leaf Preserve and Perry Park, Austin, TX
SIGN-UP! John Berry: (512) 921-1472 (cell) or

***8:45 am - Location 1: Bright Leaf Preserve (
Parking: lot off Creek Mountain Road (first road west of Mesa off south side of 2222)

***11:45-12 noon – Location 2: Perry Park behind (west) of Highland Park Elementary School; 1.5 miles SE of Bright Leaf Preserve
Parking: Lot southeast of Russel’s Bakery (3339 Hancock Drive, 78731) between tennis courts and Crenshaw Athletic Club or Immediately east of Highland Park Elementary (4900 Fairview Drive, 78731)

***12:15-12:30 – Walk 200 yards to Russel’s Bakery for light lunch at own expense (optional)

***1:00 pm-ish – Done!

Other details:

Location 1: Bright Leaf Preserve outing details from John Berry: Mostly on Gravel paths, well-graded, but some steep areas. We will see mostly Glen Rose Formation, perhaps some Walnut if we go high enough. Three thick beds of limestone have been quarried to build old Austin, and there some old tools left (or were!). Some parts of the area have intense vertical fracturing: the fractures are filled with calcite or dolomite. I will be looking for a particular type of pressure-solution feature, and also for paleosols and tempestites. There are also the remains of an old cedar-chopper settlement. If you are interested in plants or birds there is also a great deal to see. There are no facilities (other than outhouses) at Bright Leaf, so bring water, good foot-wear, a hat, and camera/notebook/compass/etc.

Location 2: Perry Park / Mt Bonnell Fault outcrop: We should observe slickensides (oblique motion: HW down and to S) on multiple fault planes, fault breccia, evidence for low-temperature hydrothermal flow (vugs with saddle dolomite and euhedral strontianite [SrCO3] (or perhaps celestite [SrSO4]?). A slight anticline in the footwall focused the rising fluids.

Also note that the Bright Leaf Preserve is managed by the Austin Community Foundation, the same organization that manages the AGS scholarship fund!
Dec 7th, 2015 (Mon)
  AGS Meeting December 7th at 6:30pm
Dr. Fred Taylor--Sr. Research Scientist, Institute for Geophysics, Jackson School of Geosciences, The University of Texas at Austin

"Vertical forearc tectonic displacements offer insights into underlying interplate thrust zone processes: 104-105 yr uplift/subsidence cycles in Southwest Pacific arcs may represent recoverable plastic deformation that is often falsely attributed to other causes."

Bureau of Economic Geology
10100 Burnet Rd., ROC conference room
Austin, Texas
Dec 13th, 2015 (Sun)
5:00 PM - 9:00 PM
When: Sunday, December 13th, 5 - 9 p.m.

Where: At the home of John and Ingrid Berry (near the intersection of RM2222 and MoPac, please see AGS email announcement or email John for address).

Who: AGS Members and significant others are invited.

What: Traditional Holiday Food, Mulled Cider (incl. Gluten Free and Vegetarian items), Music. BYOB Alcoholic Drinks

Why: To help kick-off our new scholarship fund, now that we are 501c3. "Free-will" donations gratefully accepted.

Action Item: RSVP to John Berry,, by Wednesday, December 9th, 2015.

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The Austin Geological Society began in April 1965 when a small group of geologists met to promote better professional communication among the geologists in the Austin area.

Click here to learn more about our organization.

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