Blue Mount Quarry, Blue Mount, Baltimore Co., Maryland, USA
|Latitude & Longitude (WGS84):||39° 36' 30'' North , 76° 37' 55'' West|
|Latitude & Longitude (decimal):||39.60833,-76.63194|
|Köppen climate type:||Cfa : Humid subtropical climate|
A traprock quarry in serpentinized gabbro. The contact with the Wissahikon schist is exposed in the quarry.
4 valid minerals.
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
|Paleozoic - Proterozoic|
252.17 - 2500 Ma
Age: to Permian (252.17 - 2500 Ma)
Description: Chiefly serpentinite with partly to completely altered dunite, peridotite, pyroxenite, and massive to schistose soapstone; talc-carbonate rock and altered gabbro are common in some bodies.
Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. 
485.4 - 541 Ma
|Paleozoic sedimentary and volcanic rocks|
Age: Cambrian (485.4 - 541 Ma)
Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529.