Shinarump Conglomerate
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The Shinarump Conglomerate is a geologic formation found in the Four Corners region of the United States. It was deposited in the early part of the Late Triassic period.
Quick Facts Type, Unit of ...
Shinarump Conglomerate | |
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Stratigraphic range: early Late Triassic 230–225 Ma | |
Type | Geological formation |
Unit of | Chinle Formation |
Underlies | Petrified Forest Member and other sub-units, Chinle Formation |
Overlies | Moenkopi Formation units-(250-225 Ma), after erosion unconformity Temple Mountain Member-(lowest Chinle Formation), Moenkopi Formation-(Monument Valley, Arizona-Utah), De Chelly Sandstone-(50 ma erosion unconformity-Canyon De Chelly National Monument) |
Thickness | 200 feet (61 m) maximum variable |
Lithology | |
Primary | conglomerate, sandstone, siltstone |
Location | |
Coordinates | 37.012°N 112.358°W / 37.012; -112.358 |
Region | Colorado Plateau |
Extent | NNW-southeast perimeter Black Mesa (Arizona) NE & E-Defiance Plateau-(Uplift) S-north perimeter foothills White Mountains W & NW-Painted Desert |
Type section | |
Named for | Shinarump Cliffs |
Named by | Gilbert |
Year defined | 1875 |
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