Cordilleran Section - 109th Annual Meeting (20-22 May 2013)

Paper No. 1
Presentation Time: 1:30 PM-5:30 PM

RECENT GEOLOGICAL MAPPING OF THE COYOTE MOUNTIANS, WESTERN SALTON TROUGH, IMPERIAL COUNTY, CALIFORNIA


MORGAN, George, NA, 4671 Lee Ave, La Mesa, CA 91942 and MORGAN, J.R., 4671 Lee Avenue, La Mesa, CA 91942-6938, georgemorgan@Cox.net

Some of the results from several years of geological mapping of the Coyote Mountains, an on-going geological project, show the following: 1). Active left-lateral faulting and reactivation of older faults in a right-lateral stress field, 2). Landslides and several terraces associated with the uplift of the Coyote Mountains; 3). Pliocene Imperial Group marine transgressions and regression with non-marine sediments, 4) Fresh water limestones (Bouse Formation equivalent?), 5). New interpretation of the Garnet Formation in relationship with the Imperial Group; 6). Cenozoic thrust and detachment faults; 7). Miocene volcanic plug and cinder cones with dated tuffs(17 +/-2Ma); 8). Cretaceous and Jurassic igneous dated rocks; 9). Folded and faulted metamorphic rocks made up of: marbles, schists, gneisses, banned cherts, cherts, quartzites and amphibolites with pillow basalts.