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|Location is approximate, based on center of defined region.|
|Latitude & Longitude (WGS84):||38° North , 76° West (est.)|
St. Mary's County is on Maryland's Coastal Plain Province, underlain primarily by undeformed, loosely consolidated Tertiary and Quaternary sediments. Bedrock is rarely exposed, but when it is, it can yield interesting fossils and materials such as gypsum, diatomite and glauconite. The best places to find outcrop is in fresh excavation or in bluffs along the larger rivers.
Mineral ListMineral list contains entries from the region specified including sub-localities
11 valid minerals.
Rock Types Recorded
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Rock list contains entries from the region specified including sub-localities
Select Rock List TypeAlphabetical List Tree Diagram
Entries shown in red are rocks recorded for this region.
Localities in this Region
This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.
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Shattuck, G. B. et. al. (1907) St. Mary's County: Maryland Geological Survey: County Reports, 209 p.
Means, J. (2010) Roadside geology of Maryland, Delaware and Washington, D.C.: Mountain Press, 346 p.