Cordilleran Section - 108th Annual Meeting (29–31 March 2012)

Paper No. 5
Presentation Time: 08:30-18:30

RECENT MAPPING IN THE COYOTE MOUNTAINS, WESTERN SALTON TROUGH, IMPERIAL COUNTY SOUTHERN CALIFORNIA, USA


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

Results from several years of an on-going mapping program in the Coyote Mountain at a scale of 1:2,000 shows the following: 1). Active left-lateral faulting and reactivation of older faults in a right-lateral environment; 2). Landslides and several terraces associated with the uplift of the Coyote Mountains; 3). Pliocene marine and non-marine transgressions and regressions; 4). Cenozoic thrust and detachment faults; 5). Miocene volcanic plugs, and U/Pb dated tuffs (17 Ma); 6). Cretaceous and Jurassic plutonic rocks; 7). Folding and faulting of metamorphosed Paleozoic and Mesozoic rocks, containing, marbles, schists, meta-cherts and amphibolites with meta-pillow-basalts.