Three-Dimensional Geologic Model of Complex Fault Structures in the Upper Seco 
Creek Area, Medina and Uvalde Counties, South-Central Texas.

By Michael P. Pantea, James C. Cole, Bruce D. Smith, Jason R. Faith, Charles D. 
Blome, and David V. Smith

SIR 2008-5131

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Disc Contents

In addition to this discussion, this publication contains
a complete faulted 3–D surface and volume model with
supporting digital data sets of stratigraphic units and HEM
information in the study area. The data sets include drill-hole
from core and geophysical logs, surface geology and elevation,
and HEM data. The model may be explored and .jpg or .tiff
images saved of user-defined views. Both a basic “getting
started” help file by Pantea and Cole (2004) and detailed help
files are provided as aids to understanding the 3–D viewer.
We included viewers for Windows XP™, Linux, and SUN™
platforms. However, the SUN™ platform requires additional
drivers available from SUN™. Once in the viewer program,
all functions operate the same. The USGS has licensed the
rights from Dynamic Graphics, Inc., to provide an encrypted
model and the viewers to use the enclosed data sets and
interpreted model. The license allows the USGS the service
and rights to provide unlimited distribution. We designed this
product to function from the DVD–ROM media but
recommend the necessary files be copied to a local hard drive
for better performance. No additional installation programs
are needed to view the model and data sets using the 3–D
viewer. More information about the viewing software and
EarthVisionTM may be obtained from Dynamic Grapics, Inc .,
at http: //www.dgi.com.