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| | Physical Geography of the U.S. (Site not responding. Last check: ) |
 | | Geologically, the Middle Rockies are mainly folded mountains like the Bighorn Mountains, which have been eroded exposing the crystalline rock core (mainly granite), uplifted fault blocks like the Tetons, and the remains of volcanic plateaus like the Absaroka Mountains. |
 | | The events include the rafting in on an oceanic plate "immigrant" terranes that were jammed against the continent, sedimentary rock formation some of which was eventually metamorphosed, the subduction of the Kula and Farralon plates causing widespread volcanism and plutonic action, which emplaced the great granitic Sierra batholith, faulting, and uplift. |
 | | Geologically, Florida is the emerged part of the Peninsular Arch, which is underlain with Cretaceous limestone that accounts for the large number of sinkholes and most of the nearly 8,000 lakes. |
| www.sfo.com /~parvin/geology.html (16870 words) |
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