2008 Joint Meeting of The Geological Society of America, Soil Science Society of America, American Society of Agronomy, Crop Science Society of America, Gulf Coast Association of Geological Societies with the Gulf Coast Section of SEPM

Paper No. 5
Presentation Time: 11:00 AM

Lower Tertiary (EOCENE) Transpresive Coahuilan Revolution of Northern Mexico

CHARLESTON, Santiago, South Texas College (Retired), 2201 S. Jackson Rd. Apt. 41-N, Pharr, TX 78577, chanti38@yahoo.com

During many years the great majority of geologists, considered that the structures of the Sabinas Basin in northern Mexico, were a consequence of the Upper Cretaceous Laramide Revolution.

Recent geologic and seismic evidence, indicates very clearly, that most of the anticlines, sinclines and faults, outcropping in the Sabinas Basin, are a consequence of a lower tertiary (eocene) transpresive event.this tectonic episode is given the name of the "Coahuilan revolution" by the author.

The seismic data also clearly indicates, that the compressive forces that folded and faulted the producing structures of the basin, acted in a direction ne-sw. This compressive direction is completely different to the Laramide forces, that deformed the structures of the Sierra Madre Oriental folded belt located between the cities of Torreon and Monterrey, Mexico, that acted from south to north.

To recognize the presence of the transpressive forces in the Sabinas Basin of northern Mexico, has very important consequences, not only from the economic-petroleum geology point of view, but also from the biologic field.