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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.
State Maryland
Name Stonehenge Limestone
Geologic age Ordovician
Primary rock type limestone
Secondary rock type dolostone (dolomite)
Other rock types calcarenite
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone
Minor
Sedimentary > Clastic > Sandstone > Arenite > Calcarenite
Sedimentary > Carbonate > Dolostone
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Unpublished digital version of the Maryland state geologic map that was digitized by the USGS Water Resources Office in Towson, MD
Counties Washington