Summerville Formation
Geologic formation in Four Corners region, US / From Wikipedia, the free encyclopedia
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The Summerville Formation is a geological formation in New Mexico, Colorado, and Utah of the Southwestern United States. It dates back to the Oxfordian stage of the Late Jurassic.[1]
Quick Facts Type, Unit of ...
Summerville Formation | |
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Stratigraphic range: Oxfordian 161–151 Ma | |
Type | Geological formation |
Unit of | San Rafael Group |
Sub-units | Bluff Sandstone |
Underlies | Morrison Formation |
Overlies | Todilto & Curtis Formations |
Thickness | 100 m (330 ft) |
Lithology | |
Primary | Mudstone, sandstone |
Other | Gypsum |
Location | |
Coordinates | 39.216°N 110.544°W / 39.216; -110.544 |
Approximate paleocoordinates | 31.9°N 54.7°W / 31.9; -54.7 |
Region | Four Corners, (Southwestern United States) |
Country | United States |
Extent | Henry Mountains, Paradox Basin |
Type section | |
Named for | Summerville Point, Emery County, Utah |
Named by | James Gilluly & J.B. Reeside Jr. |
Year defined | 1928 |
Summerville Formation outcrops in Utah, Colorado and New Mexico |
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