Flythrus in the Southern Carrizo Plain around the Dragon's back pressure ridge and the Northern Elkhorn Hills

These movies were generated by George Hilley on the ASU Visualization Laboratory SGI Octane (vissys5) using ERDAS Imagine Virtual GIS (supported by ASU VPR and NSF). The 3 meter DEM was produced using ERDAS Imagine Orthomax softcopy photogrammetry on BLM color aerial photographs (a rectfied version of which is the raster drape).

This flythru shows the impressive landforms that have been developed adjacent to the San Andreas Fault (SAF) in the southern Carrizo Plain. The major features include the Dragon's Back Pressure ridge (3km long) along the southwest side of the SAF, and the uplifted Northern Elkhorn Hills on the northeast side of the SAF with an active northeast vergent fold on the northeast side and a series of active normal faults bounding grabens in the interior.

The flight starts along the Dragon's Back and moves northwestward. Most of the humps on the left (the Carrizo Plain side) are artifacts from the DEM extraction (we still need to get the Crystal Eyes stereo glasses to edit the DEMs). The flight turns northeast over the northwestern edge of the Dragon's Back and across the SAF to turn southeast over the Elkhorn Plain. You can see the Elkhorn Road on the northeast edge of the image. Then, we fly along the Elkhorn Plain southeast crossing over the folded front with a beheaded drainage and into the Northern Elkhorn Hills and turn back northwest over the prominent grabens, fly northwest along the northeast side of the Dragon's Back and then turn back southwest, crossing the SAF and the Dragon's Back, out onto the Carrizo Plain.

Look here for more links about this area:
http://activetectonics.la.asu.edu/carrizo/
http://www.public.asu.edu/~arrows/images.html

Download 19 mb mpeg video:
http://activetectonics.la.asu.edu/carrizo/DBmovie_small.mpg

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Pages maintained by Ramón Arrowsmith
Last modified April 2, 2000.