February 23 - The Geologic History of Texas Introduction...

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The Geologic History of Texas Introduction - Texas has rocks of geologic age o Mesozoic – which is more divided (etc)  o Cenozoic (volcanic) o Cenozoic –tx high plains (sedimentary)  o Mesozoic o Paleozoic- north central plains o Precambrian Region  Central mineral region (central TX), van horn, Located in El Paso  Grenville Mt. Belt:  All represent eroded roots from ancient  mountain range and emerges up in Canada (Grenville Mt. Belt) Plate collision 1.3-1 billion years ago  The Precambrian plate collision produces: The Grenville Mt. belt,  Rodinia
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- Paleozoic History o Geologic History o Iapetus Ocean opens and closes o Seen near Marathon, north of Big Bend National Park and west of the  park in Big Bend Ranch State Natural Area Inland, goes down to sea level and makes PERMIAN BASIN (NW TX) Organically rich 
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February 23 - The Geologic History of Texas Introduction...

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