Tectonic History of Western North America and Southern California - A5
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Uploaded by britoca on Dec 5, 2008
High quality: http://www.youtube.com/watch?v=Xy3FudPL7qs&fmt=18
An Animated Tectonic History of Western North America and Southern California.
Tanya Atwater, Dept. Geological Sciences, University of California, Santa Barbara, CA
Summary list of QuickTime animations:
A.Pacific-North America Plate Tectonic History (map views)
1. Pacific Hemisphere, 80 Ma to Present
2. N.E. Pacific and W. North America, 38 Ma to Present
3. California, 20 Ma to Present
4. Southern California, 20 Ma to Present
5. Southern California Paleomagnetic Vectors
6. Southern California, Origin and Dispersal of the Poway Conglomerate
B.Geologic History of the Transverse Ranges, Southern California
1. Mesozoic Subduction
2. Miocene: Rifting and rotation, volcanism and deposition in marine basins
3. Plio-Pleistocene: Oblique Shortening against the "Big Bend"
4. Santa Barbara Channel Oil
A.5. Southern California with Paleomagnetic Vectors.
After Hornefius 1985. Journal of Geophysical Research, v. 90, p 12503-12522.
Dark blue = vectors measured in samples aged 29-14 Ma.
Medium blue = vectors measured in samples aged 14-11 Ma.
Dark blue = vectors measured in samples aged 11-5 Ma.
This is the primary data set that convinced most geologists the western Transverse Ranges block has rotated clockwise about 90 degrees.
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frozenstrawbs 9 months ago