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A. H. Smith Granite Quarry (A. H. Smith Stone Louisa Quarry), Louisa Co., Virginia, USA

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Latitude & Longitude (WGS84): 38° 4' 18'' North , 77° 55' 34'' West
Latitude & Longitude (decimal): 38.07167,-77.92611


LEVAN, D.C., 1972, DIRECTORY OF MIN. INDUSTRY IN VA., P. 15
Commodities (Major) - Granite
Development Status: Producer
Host Rock Unit: Erwin Quartzite
Host Rock: Granite

Mineral List


Rock Types Recorded

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Regional Geology

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

Silurian - Ordovician
419.2 - 485.4 Ma
Ellisville pluton

Age: Paleozoic (419.2 - 485.4 Ma)

Description: Biotite granodiorite of the Ellisville pluton. Biotite granodiorite (Piedmont Province)

Lithology: Granodiorite

Reference: Davis, A.M., C.S. Southworth, J.E. Reddy, J.S. Schindler. Geologic Map Database of the Washington DC Area Featuring Data from Three 30 x 60 Minute Quadrangles: Frederick, Washington West, and Fredericksburg. U.S. Geological Survey Open-File Report 01-227. [69]

Silurian - Ordovician
419.2 - 485.4 Ma
Ellisville Biotite Granodiorite

Age: Paleozoic (419.2 - 485.4 Ma)

Stratigraphic Name: Ellisville Biotite Granodiorite

Description: Ellisville biotite granodiorite (Pavlides, 1990). Mesocratic, coarse- to medium-grained, equigranular to porphyritic, massive to strongly foliated granodiorite. Mineralogy: quartz + plagioclase + potassium feldspar + biotite; accessories include epidote, allanite, titanite, and apatite. Porphyritic rocks contain potassium feldspar megacrysts up to 1.5 cm across; myrmekite commonly occurs adjacent to potassium feldspar. Brownish-green, strongly pleochroic biotite is associated with, and in places poikilitically encloses epidote, allanite, titanite, and apatite. Subhedral epidote locally encloses euhedral titanite. Pleochroic green amphibole and muscovite are minor constituents locally. The Ellisville has been dated at 440±8 Ma (Rb-Sr whole rock; Pavlides and others, 1982).

Comments: Western Piedmont (Northern)

Lithology: Major:{granodiorite}

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. [133]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License



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