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Pindell Quarries No. 1, Howard Co., Maryland, USA

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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.

Mineral List


3 valid minerals.

Regional Geology

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 MaPaleogene sedimentary rocks

Sedimentary rocks

Paleozoic - Proterozoic252.17 - 2500 MaBaltimore Gabbro Complex

Major:: {gabbro},Minor:: {norite},Incidental:: {pyroxenite}

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 MaNeoproterozoic-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.



The above list 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.

References

Singewald, J. T. (1928) Notes on feldspar, quartz, chrome and manganese in Maryland: Maryland Geological Survey vol. 12 part 2: 120.

Ostrander, C. W. & W. E. Price (1940) Minerals of Maryland: Natural History Society of Maryland , 92 p.

 
Mineral and/or Locality  
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