File:Evolution of the Chiricahua Landscape.jpg
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Summary
| Description |
English: A) Before the Turkey Creek Caldera, the Chiricahua Mountains were made up of uplifted masses of Paleozoic and Mesozoic sedimentary rocks overlain and surrounded by active volcano fields. B) A series of massive eruptions blanketed a vast area of southern New Mexico and Arizona with hot ash. The Turkey Creek Caldera formed during this interval. C) A moat, or circular valley, formed when dacite magma (red) uplifted the center of the caldera. Two separate eruptions of dacite magma and rhyolite magma caused lava to flow into the moat and the Monument valley. D) Today's landscape has been greatly shaped by erosion, faulting, and landslides. |
| Date | |
| Source | Interpretive map and guide to the volcanic geology of Chiricahua National Monument and vicinity, Cochise County, Arizona. U.S. Geological Survey, Department of the Interior, http://ngmdb.usgs.gov/Prodesc/proddesc_13028.htm |
| Author | Pallister, J.S., du Brey, E.A., and Hall, D.B. |
Licensing
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This image is in the public domain in the United States because it only contains materials that originally came from the United States Geological Survey, an agency of the United States Department of the Interior. For more information, see the official USGS copyright policy.
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 19:57, 2 December 2013 | | 1,473 × 1,563 (449 KB) | Melissausburn | User created page with UploadWizard |
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