(150 Kbytes image size)
The overall project involves correlation of volcanic rocks across the Gulf of California, from Baja California to Sonora. Before the Gulf started spreading, there were some widespread units of welded tuff that were erupted from the early rift, and are probably preserved on both sides of the rift now.
The TM data from Tiburon Island and coastal Sonora is being used as a tool to identify possible correlative units and for interpretation of the overall geology, prior to conducting more detailed field work to check the correlations. Correlations will be confirmed via the detailed field work, phenocryst content and geochemistry, argon geochronology on particular units, and paleomagnetic remanence vectors.
Below is a Landsat TM image of Tiburon Island, Mexico, processed with
ER Mapper to enhance specific volcanic rock units.
(150 Kbytes image size)
|
11/08/99 |