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Tonoloway Limestone

Tonoloway Limestone - Gray, thin-bedded limestone, dolomitic limestone, and calcareous shale; thin sandstone member in east 20 feet above base; fossiliferous; thickness 400 feet in east, increases to 600 feet in west.
StateMaryland
NameTonoloway Limestone
Geologic ageSilurian
Original map labelStl
Primary rock typelimestone
Secondary rock typeshale
Other rock typessandstone
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone
Minor
Sedimentary > Clastic > Mudstone > Shale
Incidental
Sedimentary > Clastic > Sandstone
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Unpublished digital version of the Maryland state geologic map that was digitized by the USGS Water Resources Office in Towson, MD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 coverageAllegany - Washington

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