Geology From Google Earth Throughout the Santa Rosa Plateau

• Wiashal Trail Area

• Wiashal Trail Area - Zoom. Note boulders of Woodson Mountain Granodiorite at left and bottom; rest is Bedford Canyon Formation.

• Visitor Center Area

• Visitor Center Area - Zoom. Note boulders of Woodson Mountain Granodiorite in left half of picture; rest is Bedford Canyon Formation.

• Sylvan Meadows East Area

• Sylvan Meadows East Area - Zoom 1. Note boulders of Woodson Mountain Granodiorite covering right two-thirds of picture. Turner and Loera 2003 mapped the left one-third of picture as Woodson Mountain Granodiorite. No boulders are visible in this picture, but they may simply be deeply weathered here, or covered by alluvium.

• Sylvan Meadows East Area - Zoom 2

• Sylvan Meadows West Area

• Sylvan Meadows West Area - Zoom. Note boulders of Woodson Mountain Granodiorite covering right half of picture. Left half is Bedford Canyon Formation.

• Mesa de Colorado and North. Mesa de Colorado, with three (dry) Vernal Pools Visible at bottom is covered with Santa Rosa Basalt, but it cannot be readily identified in this picture. Note the absence of Woodson Mountain Granodiorite north of the Mesa. This area is mostly mapped as Bedford Canyon Formation by Turner and Loera 2003, with a small portion of Gabbro immediately north of the Mesa.

• Los Santos Trail, Hidden Valley Spur Road, and Hidden Valley Road - Zoom. Note the complete absence of Woodson Mountain Granodiorite; this area is entirely Bedford Canyon Formation. The yellow / brown color is probably due to sycamore leaves in the winter.

• Vernal Pool Trail at Dropoff from Mesa de Colorado - Zoom. The boulders here are Santa Rosa Basalt, and are not nearly as white as the boulders of the Woodson Mountain Granodiorite in other pictures.

• Lower Portion of Punta Mesa Trail - Zoom. This area is almost entirely Bedford Canyon Formation.

Go to:

• 3 November 2007 Talk On Brodiaea santarosae And Geology Of The Santa Rosa Plateau

Copyright © 2007 by Tom Chester.
Permission is freely granted to reproduce any or all of this page as long as credit is given to me at this source:
http://tchester.org/srp/hikes/tc/geology/pix/google_earth.html
Comments and feedback: Tom Chester
Updated 2 November 2007.