Geologic Map of West Virginia
West Virginia Geological and Economic Survey, Robert B. Erwin,
State Geologist, 1969
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- Permian or Pennsylvanian
- (230+ million years ago)
Cyclic sequences of sandstone, red beds, shale, limestone, and coal. Coal
- Pennsylvanian
- (280 - 310 million years ago)
Cyclic sequences of sandstone, shale, clay, coal, and limestone. Coal,
gas, brine
- Mississippian
- (310 - 345 million years ago)
Limestone, red beds, shale, and sandstone. Limestone, gas, oil, brine
- Devonian
- (345 - 405 million years ago)
Red beds, shale, sandstone, and chert. Gas, silica sand, limestone
- Silurian
- (405 - 425 million years ago)
Sandstone, shale, limestone, rock salt, and ferruginous beds. Gas, limestone,
artificial brine
- Ordovician
- (425 - 500 million years ago)
Limestone, dolomite, sandstone, shale, and metabentonite. Limestone
(particularly low silica), building stone, clay-shale
- Cambrian
- (500 - 600 million years ago)
Limestone and dolomite, some sandstone and shale
- Precambrian
- (More than 600 million years ago)
Greenstone - Present only in extreme eastern Jefferson county.
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