Geology of the Northern Llano Uplift, Junction to Llano, Texas

This year\u27s Texas Academy of Science Geology Field Trip will visit nine interesting locations in two different areas in the Texas Hill Country (Figure 1). In the first area we will look at the Cretaceous stratigraphy around Junction, Texas (Figures 1, 2, 3, and 4). The expedition will then travel to the northern part of the Llano uplift and study Cambrian and Precambrian stratigraphy and structure of the northern Llano Uplift (Figures 4 and 5). Stop 9 will be at Cooper’s BBQ for lunch

Geology and Fossils of North Central Texas (Fort Worth to Mineral Wells): Texas Academy of Science February 28 2021

The 2021 Texas Academy of Science Geology field trip will be a virtual field trip that you may run at any time. It will have two parts;Part 1 consists of a video discussion of each stop( https://www.youtube.com/watch?v=EJKSgqtLvw0)and Part 2 consists of this field trip guidebook (for use when visiting each of the locations). The field trip will start at Holiday Park,near Benbrook,southwest of Fort Worth,Texas, and will end at the Mineral Wells Fossil Park, west of Minerals Wells, Texas.

Geology of the Western Llano Uplift, Fredericksburg to Mason, Texas

This year\u27s Texas Academy of Science Geology Field Trip will visit six interesting locations in the Texas Hill Country (Figure 01). At Bear Mountain quarry, former location of Balanced Rock, the contact between the Precambrian Bear Mountain Pluton and surrounding Cretaceous Edwards Group will be examined. Along Crab Apple Creek, south of Enchanted Rock, excellent exposures of the Hickory Sandstone provide the opportunity to study sedimentary structures and cross-bedding that represent the Sauk sequence deposited during the Cambrian Period (Figure 02). Next we will look at a Gypsum Mine and deposits of evaporites from the Cretaceous Kirschberg Lagoon (Figure 03 and 04). We will then take the back roads of the Llano Uplift to an interesting exposure of the Precambrian- Cambrian boundary represented by a nonconformity that shows the transgression of Cambrian seas (Sauk Sequence) across the eroded Precambrian Cherry Springs Pluton (Town Mountain). Next, we will stop at Comanche Creek south of Mason, Texas, to study complex folds in the Packsaddle Schist. These folds represent deformation of the Llano Uplift area during the Greenville Orogeny 1.2 Ga years ago. The last stop on the field trip will be at White’s Crossing near the Llano River, to ponder the origin and development of spectacular stromatolites exposed by uplift along faults in the area and down cutting of the Llano River. And finally, since no trip to the Llano Uplift is complete without a stop at a Coopers BBQ, we will have lunch at the Coopers in Mason, Texas

Oysters and Mammoths: Fossils in Central Texas–Texas Academy of Science 2017

Texas Academy of Science, 2017 Field Trip This year\u27s Texas Academy of Science Geology Field Trip takes you to two very different fossil sites in central Texas. Stop 1 is along a quiet road in the Hill Country where you can collect abundant invertebrate fossils from the Lower Cretaceous Comanche Peak Limestone and Walnut Clay. The second stop of the trip is at one of the newest units of America\u27s park service: the Waco Mammoth National Monument. At this site you will see a spectacular fossil discovery that is now one of the main mammoth sites in North America. And at this location you will NOT be able to collect fossils