California Geology

Guess these facts about California’s Geology

These are only some of the highlights. California’s geology is much more fascinating and complex than this quiz implies!

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Last updated: August 20, 2019

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First submitted	August 20, 2019
Times taken	38
Average score	35.3%
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Hint	Answer
Major plate boundary pictured above	San Andreas Fault
Tectonic Plate east of above	North American
Tectonic Plate west of above	Pacific
Fault along the Tehachapi Mountains	Garlock Fault
Large lake near Imperial Valley	Salton Sea
Type of plate boundary near the above	Divergent
Area of major fault around Mount Piños where plates are converging like in Nepal	Big Bend
Tectonic Plate that once subducted under California	Farallon Plate
Volcanic Mountains that formed as a result of above’s subduction	Sierra Nevada

Hint	Answer
Remnant of that plate still subducting under the Pacific Northwest	Juan De Fuca
Name a volcano in California that formed as a result of that plate’s subduction	Mt. Shasta, Mt. Lassen, Medicine Lake
Caldera near Mammoth Mountain	Long Valley
Rock Structure in Devil’s Postpile National Monument	Columnar Basalts
What carved Yosemite Valley	Glacier
Cone-shaped river deposit at the mouths of canyons	Alluvial Fan
Natural oil seeps in La Brea and Carpinteria with Ice Age fossils	Tar Pits
Underwater gorges found off the coast of California, such as in Monterey Bay	Submarine Canyon