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  3. Geoelectric and Seismic Data acquired in the Precambrian Granite Gravel Aquifer, Llano Uplift, Central Texas, May 2017 - August 2018

Geoelectric and Seismic Data acquired in the Precambrian Granite Gravel Aquifer, Llano Uplift, Central Texas, May 2017 - August 2018

Dates

Publication Date
Start Date
2017-05-14
End Date
2018-08-02

Citation

Ikard, S.J., Wallace, D.S., Teeple, A.P., Stanton, G.P., Merrill, K., and Pasley, N.K., 2019, Geoelectric and Seismic Data acquired in the Precambrian Granite Gravel Aquifer, Llano Uplift, Central Texas, May 2017 - August 2018: U.S. Geological Survey data release, https://doi.org/10.5066/F72Z14G6.

Summary

This data release contains geophysical data and well and borehole driller's logs acquired at a small field site in the Llano Uplift of central Texas. The field site is underlain by the unconfined Precambrian Granite Gravel aquifer and the Precambrian Town Mountain Granite bedrock from which the Granite Gravel Aquifer was derived through chemical and mechanical weathering. The data set consists of five types of data in the quantities indicated: (1) 1 time-domain electromagnetic sounding, (2) 441 self-potential measurements, (3) 2 electrical resistivity tomography profiles, (4) 2 seismic refraction tomography profiles, and (5) 4 driller's logs (obtained from 2 wells and 2 shallow boreholes). The data were collected primarily from within [...]

Contacts

Point of Contact :
Public Information Officer, Oklahoma-Texas Water Science Center
Originator :
Scott J Ikard, David S Wallace, Andrew P Teeple, Gregory P Stanton, Kelvey Merrill, Nathaniel K Pasley
Metadata Contact :
Public Information Officer, Oklahoma-Texas Water Science Center
Publisher :
U.S. Geological Survey
Distributor :
U.S. Geological Survey - ScienceBase
SDC Data Owner :
Oklahoma-Texas Water Science Center
USGS Mission Area :
Water Resources

Attached Files

Click on title to download individual files attached to this item.

Granite_Gravel_Aquifer_Metadata.xml
Original FGDC Metadata
View 		73.31 KB application/fgdc+xml
Well_A_Hydrograph_May_2017.txt 476 Bytes text/plain
GGA_Borehole_C_Drillers_Log.pdf 51.53 KB application/pdf
GGA_Borehole_D_Drillers_Log.txt 691 Bytes text/plain
GGA_Well_A_Drillers_Log.pdf 53.11 KB application/pdf
GGA_Well_B_Drillers_Log.pdf 52.65 KB application/pdf
GGA_SRT_Raw_Data.txt 9.21 MB text/plain
GGA_SRT2_First_Arrivals.txt 2.37 KB text/plain
GGA_SRT2_Velocity_Model_Output.txt 7.57 KB text/plain
GGA_SRT_Survey_Geometry.txt 2.65 KB text/plain
GGA_SRT1_First_Arrivals.txt 2.96 KB text/plain
GGA_SRT1_Velocity_Model_Output.txt 7.43 KB text/plain
GGA_ERT_XYZ.txt 4.99 KB text/plain
GGA_Profile_ERT1_RES2D_Input_20190619.Dat 15.73 KB text/plain
GGA_Profile_ERT1_RES2D_Output_20190619.dat 14.85 KB text/plain
GGA_Profile_ERT2_RES2D_Input_20190619.Dat 15.73 KB text/plain
GGA_Profile_ERT2_RES2D_Output_20190619.dat 14.85 KB text/plain
GGA_RES2D_Inversion_Parameters_20190619.ivp 6.59 KB application/vnd.immervision-ivp
GGA_SP_CR_Survey_Data.txt 39.19 KB text/plain
GGA_SP_Drift_Data.txt 73.71 KB text/plain
GGA_TDEM_100m_Input_20190619.usf 5.8 KB text/plain
GGA_TDEM_100m_Model_20190619.IXP 29.45 KB application/unknown
GGA_TDEM_100m_Output_20190619.TXT 12.33 KB text/plain
Main Figure.jpg thumbnail 184.93 KB image/jpeg

Purpose

Non-invasive geophysical methods (time-domain electromagnetic sounding, self-potential mapping, electric resistivity tomography, and seismic refraction tomography) were used with information obtained from driller's logs from two wells and two boreholes to create the dataset documented herein. These data were used in a companion journal article to help characterize the geophysical properties of the Precambrian Granite Gravel Aquifer and the Precambrian Town Mountain Granite in the Llano Uplift of central Texas. Because the objective was to achieve higher-resolution data than typical geophysical reconnaissance surveys provide, most of the data were collected within a 100-m by 100-m field site. One profile of seismic refraction data was also acquired outside of this area, centered upon an pre-existing well.
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Communities

  • USGS Data Release Products
  • USGS Oklahoma-Texas Water Science Center

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Type Scheme Key
DOI https://www.sciencebase.gov/vocab/category/item/identifier doi:10.5066/F72Z14G6

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