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Stonehenge Limestone

Stonehenge Limestone - Upper part gray, thin-bedded, coarse-grained to conglomeratic, oolitic calcarenite; some dolomite; lower part gray, thick-bedded, fine-grained algal limestone; thickness 500 to 800 feet.
StateMaryland
NameStonehenge Limestone
Geologic ageOrdovician
Original map labelOs
Primary rock typelimestone
Secondary rock typedolostone (dolomite)
Other rock typescalcarenite
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone
Minor
Sedimentary > Carbonate > Dolostone
Sedimentary > Clastic > Sandstone > Arenite > Calcarenite
Map references
Cleaves, E.T., Edwards, J., Jr., Glaser, J.D., 1968, Geologic Map of Maryland: Maryland Geological Survey, Baltimore, Maryland, scale 1:250,000.
Unit references
Cleaves, E.T., Edwards, J., Jr., Glaser, J.D., 1968, Geologic Map of Maryland: Maryland Geological Survey, Baltimore, Maryland, scale 1:250,000.
Unpublished digital version of the Maryland state geologic map that was digitized by the USGS Water Resources Office in Towson, MD
Geographic coverageWashington

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URL: http://mrdata.usgs.gov/geology/state/sgmc-unit.php?unit=MDOs;1
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