Discovering Westcave: The Natural and Human History of a Hill Country Nature Preserve
By S. Christopher Caran and Elaine Davenport
Foreword by Andrew Sansom
October 2016, TAMU Press
NSS Webinar (Jan 24): Geophysical applications to the karstic features of Edwards Aquifer in Central Texas
Geophysical applications to the karstic features of Edwards Aquifer in Central Texas
Presenter: Mustafa Saribudak (AGS member)
Join us for a webinar on Jan 24, 2017 at 8:00 PM CST / 9PM EST / 7PM MST / 6PM PST please check your time zone for the correct starting time.
Register now!
https://attendee.gotowebinar.com/register/1694532516059446531
Geophysical applications to the karstic features (caves, sinkholes, major faults, and conduits) of Edwards Aquifer in Central Texas.
This webinar presents mainly resistivity imaging (2D and 3D), natural potential (NP) and some other geophysical data (conductivity, magnetic, induced polarization, and seismic refraction data) collected over the karstic features of the Edwards Aquifer between the years of 2000 and 2016. These karstic features are caves filled with air or clay (or sediments) and/or both, sinkholes and major faults such as Mt. Bonnell, Haby and Barton Springs faults and conduits.
Detecting these karst-related features using these geophysical methods has been proven over the years. But each method has limitations in depth and resolution accuracy based on geological factors and size, shape, of the karstic feature. In addition, some methods, such as gravity, and seismic, take longer and they may be cost-inhibitive.
About 16 years of experience in endeavoring to locate these karstic features have proven that the best geophysical methods have been the combination of NP and resistivity techniques. Several case studies of resistivity and NP methods applied to the karstic features and to the major faults will be discussed in detail in this presentation.
Mustafa Saribudak, Ph.D. is the President of Environmental Geophysics Associates (EGA). He received a master's degree in geology and a doctorate in geophysics from Istanbul Technical University, Turkey. He came to the University of Houston in 1989 to work on a project funded by the National Science Foundation. He worked for Tierra Environmental between 1990 and 1993, where he pioneered application of geophysical methods to environmental problems. He founded EGA in 1994 to provide near-surface geophysical services for engineering, environmental, the oil and gas industry, and real estate developers. During the last sixteen years he has conducted geophysical surveys at more than 300 sites in the U.S and Central America. He has published numerous papers and short notes in geophysical and environmental journals. He is certified with the Texas Board of Professional Geoscientists (Geophysics). He is an active member of Society of Exploration Geophysics, Environmental & Engineering Geophysical Society, Houston Geological Society, and Houston Geophysical Society, Austin Geological Society, South Texas Geological Society. He lives in Austin, Texas.
This and other webinar will be recorded and stored on the NSS website caves.org for future viewing.
The opinions in this webinar are not necessar
After registering, you will receive a confirmation email containing information about joining the webinar.
In Memoriam: Robert Lee Bluntzer
We are sorry to announce that long-time AGS member Robert Lee Bluntzer, age 83, passed away on December 2, 2016. AGS extends condolences to the Bluntzer family. More information can be found here.
In 2006 Bob wrote an AGS Bulletin paper about his work on the water well on the Texas State Capitol grounds. Click here to read the paper.
AGS members lecture students at Mount Bonnell
AGS members John Mikels, Jim Sansom, and Brian Hunt spoke to the 8th grade science classes from the Ann Richards School for Young Women Leaders on November 17th and 18th. Central Texas geologic history, processes, landscapes, and its influence on humans were discussed from the hill top.
Group shot from one of the 8th grade science classes from the Ann Richards School for Young Women Leaders. November 18, 2016.
Thank you letter from student after the trip.
New Publication: Texas Through Time
Tom Ewing will be present at our meeting on December 5th to say a few words about his book “Texas through Time” The book is published by BEG, and will be for sale in the lecture theatre before the meeting. Tom will be there to autograph the book. Softback $35.00, Hardbound $50.00 plus tax.
Explore the landscapes, rocks, and resources of Texas and 1.7 billion years of Earth history in Texas Through Time by noted geoscientist Thomas E. Ewing. Visit the ancient rocks of the Llano and Van Horn areas, the legacy of now-eroded Himalaya-type ranges that initially rose more than 1 billion years ago. Marvel at the giant West Texas Basin, so prolific in oil and gas, and the enigmatic Marathon and Ouachita Mountains. Watch North America separate from the supercontinent Pangea and create the enclosed, salt-rich Gulf of Mexico in its wake. Discover the vast carbonate platform that today makes up the Edwards Plateau and Texas Hill Country. And witness the complex story of mountain building, uplift, and delta building that formed today's Texas landscapes. Special chapters consider Texas resources and geologic hazards, as well as the impact of geology on human settlement during the last 15,000 years. Texas Through Time contains more than 500 full-color photos, illustrations, and maps, all showing the state’s development through geologic “deep time.”