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- Plate tectonics (27764 bytes)
1: ...tinental drift]], and is currently the theory accepted by the vast majority of scientists working in t...
5: ...1960s]] and has since almost universally been accepted by scientists and has revolutionized the [[Eart...
31: ...preading center the action becomes clear. Crest depths of the old ridges, parallel to the current spr...
33: ...hat one of the key pieces of evidence forcing acceptance of the sea-floor spreading hypothesis was fou...
37: ...d by alternating periods of quiet and episodic eruptions that start with explosive gas expulsion with ... - Supercontinent (3497 bytes)
- Geologic time scale (26014 bytes)
7: .... In many cases, such faunal stages have been adopted in building the geologic nomenclature, though i...
15: ...entury. The most influential of those early attempts (championed by [[Abraham Werner]], among others)...
19: ...]], and the name "Carboniferous" was simply an adaptation of "the Coal Measures," the old British geol...
73: ... sea. Primitive [[Aves|birds]] gradually replace pterosaurs. [[Monotremes]], [[marsupial]]s and [[pl...
92: ...mammal-like. First [[dinosaur]]s, [[mammal]]s, [[pterosaur]]s, and [[crocodilia]]. ''[[Dicrodium]]''... - Death Valley National Park (38245 bytes)
1: ...pecies of [[plant]]s and [[animal]]s that have adapted to this harsh [[desert]] environment. Some exam...
85: ...ath and Panamint valleys area from space. The elliptical depression to the left is the Searles Lake ba...
98: ...carbonate-rich sediments were periodically interrupted by periods of emergence. Although details of ge...
100: ...events in Death Valley.png|timecale image]]). Erupting volcanoes and uplifting mountains were created...
102: ...aged sedimentary formations exist in the area except for some possibly Jurassic age [[volcanic rock]] ... - Pangaea (1625 bytes)
- Paleozoic (2894 bytes)
5: ... dominated by large, relatively sophisticated [[reptile]]s and relatively modern [[plant]]s. The lower...
9: ... end of the era, the first large, sophisticated reptiles and the first modern plants ([[conifer]]s) ha...
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