(Dec. 2, 2009)--Research projects by Stuart Birnbaum, UTSA associate professor of geological sciences, and Daniel Lupton, a UTSA master's student in geological sciences, reveal new information about Central Texas' climate and water sources.
Birnbaum's team researched the ancient climate preserved in the chemical signature of samples from Kimble County, Texas, by taking rock samples from a 12-meter cliff exposure of the Hensel paleosol, an ancient soil estimated to be approximately 112 million years old.
"Our research is significant, because it could help us calculate the rate at which climate change took place in Earth's pre-human past," said Birnbaum. "Generally, we've learned that the climate 112 million years ago in what is now Central Texas was warm and arid, similar to what we see today. Once we learn how long it took the Hensel paleosol to form, we'll be in a better position to understand the human influence on global warming in the area."
The scientists analyzed carbon and oxygen isotopes and other elements present in the rock samples through various experiments. They learned that the soil formed at a temperature of 17 degrees Celsius (62.6 degrees Fahrenheit) at the base and 22 degrees Celsius (71.6 degrees Fahrenheit) at the top, a change of 5 degrees Celsius (9 degrees Fahrenheit). They also learned that the paleosol received 222-243 millimeters of precipitation per year during its formation.
Focusing on watersheds, master's student Lupton also has paid close attention to Central Texas geology over the last year. He studies hydrogeology under Alan Dutton, UTSA associate professor of geological sciences and interim chair.
"State programs such as those run by the Texas Water Development Board and national programs, such as those of the U.S. Geological Survey, produce significant amounts of raw data related to geology, geography and hydrology," said Lupton. "Our research centered around processing the raw data with the desired result of creating maps of recharge and discharge zones. Knowing the geographical distribution of recharge and discharge zones affords vested interests the option of whether or not to build sustainably in an area."
For his master's thesis, Lupton merged stream data and water well data using geographic information system (GIS) technology to create a comprehensive map of recharge and discharge zones in the Central Texas Pedernales River Valley.
He focused on the geographical area over the Trinity Hill Country and Llano Uplift aquifers. His maps of recharge and discharge zones maximize the use of sparse data and are anticipated to be a contribution to the study of aquifer interactions in the area.
UTSA's Department of Geological Sciences, housed in the College of Sciences, offers bachelor's and master's programs in geology, a master's program in multidisciplinary studies and a certificate program in geographical information science grounded in research. The department's research facilities include laboratories for biogeochemistry, hydrogeology, engineering geology, isotope geochemistry, micropaleontology and stratigraphy, remote sensing and spatial analysis, and x-ray diffraction.
Learn more at the UTSA Department of Geological Sciences Web site.
Grab your friends, family, kids and dog for this annual fun run on the UTSA Main Campus benefititng the UTSA Alumni Association.
Convocation Center, Main Campus
Join the Department of Interdisciplinary Learning and Teaching for the 13th annual Storytelling Festival. The festival will feature keynote speaker Carolina Quiroga-Stultz, a Colombian Storyteller and journalist. This event is free and open to the public.
Main Building, ground floor, Main Campus
The IDS Colloquium showcases the excellent scholarship done by the IDS students in the College of Education and Human Development at UTSA. In addition, this event also honors the legacy of Dr. Marian Martinello.
Business Building, University Room (BB 2.06.04), Main Campus
The Department of Biology and the Be the Match Team will collaborate to engage and educate our students in the importance of a life saving donation through peripheral blood stem cells and a marrow harvest.
UC Paseo and Central Plaza, Main Campus
UTSA welcomes the Italian-born duo Bandini-Chiacchiaretta. They've toured the world performing Argentine Tango music on guitar and bandoneon, the instrument of Astor Piazzolla. Tickets are $10 or free with UTSA Student I.D.
Arts Building, Recital Hall (ARTS 2.03.02), Main Campus
This an annual event is open to any student who wants to participate It includes a presentation about current events and issues involving East Asia. This event is meant to deepen understanding and to raise awareness of what is currently happening in East Asia.
Business Building, University Room (BB 2.06.04), Main Campus
Join the Women’s Studies Institute and Women’s Studies Program as we celebrate our fourteenth year of Women’s History Month at UTSA. During our program, we will award Olga Madrid as the 2017 Women’s Advocate of the Year.
H-E-B University Center, Travis Room (HUC 2.202), Main Campus
Solomon’s House, presented by Sara Cusimano Miles, explores the collections repository of the Anniston Museum of Natural History in Alabama. It's free and open to the public.
Arts Building (ARTS 3.01.18 B), Main Campus
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