Pindell Quarries No. 1, Howard Co., Maryland, USA
|Latitude & Longitude (WGS84):||39° 14' 39'' North , 76° 45' 41'' West|
|Latitude & Longitude (decimal):||39.2441666667, -76.7613888889|
Quarry in pegmatite worked for alkali feldspar.
3 valid minerals.
This 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 data will improve over time as more accurate maps and data sets are added.
|Paleogene23.03 - 66 Ma||Paleogene sedimentary rocks|
|Paleozoic - Proterozoic252.17 - 2500 Ma||Baltimore Gabbro Complex|
Baltimore Gabbro Complex - Hypersthene gabbro with subordinate amounts of olivine gabbro, norite, anorthositic gabbro, and pyroxenite; igneous minerals and textures well preserved in some rocks, other rocks exhibit varying degrees of alteration and recrystallization with a new metamorphic mineral assemblage.
|Cambrian - Neoproterozoic485.4 - 1000 Ma||Neoproterozoic-Cambrian plutonic: mafic rocks|
Plutonic: mafic rocks
References for regional geology:
Data provided by Macrostrat.org
Garrity, C.P., and Soller, D.R.,. Database of the Geologic Map of North America: adapted from the map by J.C. Reed, Jr. and others (2005). U.S. Geological Survey Data Series 424 .
USGS compilers. State geologic map data. State Maps.
Geological Survey of Canada. Generalized geological map of the world and linked databases. doi:10.4095/195142. Open File 2915d.
Ostrander, C. W. & W. E. Price (1940) Minerals of Maryland: Natural History Society of Maryland , 92 p.