Quarry about a half mile east of Pilot, worked for feldspar before 1913. The workings were in a pegmatite dike (with graphic textures) intruded into a serpentinite body.

Regions containing this locality

North America Plate

Tectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

ⓘ 'Albite-Anorthite Series'

ⓘ Quartz

ⓘ Schorl

ⓘ 'Serpentine Subgroup'

2 valid minerals.

Detailed Mineral List:

ⓘ 'Albite-Anorthite Series'

ⓘ Quartz

Formula: SiO₂

ⓘ Schorl

Formula: Na(Fe²⁺₃)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)

ⓘ 'Serpentine Subgroup'

Formula: D₃[Si₂O₅](OH)₄ D= Mg, Fe, Ni, Mn, Al, Zn

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘ	Quartz	4.DA.05	SiO₂
Group 9 - Silicates
ⓘ	Schorl	9.CK.05	Na(Fe²⁺₃)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
Unclassified Minerals, Rocks, etc.
ⓘ	'Albite-Anorthite Series'	-
ⓘ	'Serpentine Subgroup'	-	D₃[Si₂O₅](OH)₄ D= Mg, Fe, Ni, Mn, Al, Zn

List of minerals arranged by Dana 8th Edition classification

Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with borate groups
ⓘ	Schorl	61.3.1.10	Na(Fe²⁺₃)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO₂ with [4] coordinated Si
ⓘ	Quartz	75.1.3.1	SiO₂
Unclassified Minerals, Mixtures, etc.
ⓘ	'Albite-Anorthite Series'	-
ⓘ	'Serpentine Subgroup'	-	D₃[Si₂O₅](OH)₄ D= Mg, Fe, Ni, Mn, Al, Zn

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Schorl	Na(Fe₃²⁺)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
H	ⓘ Serpentine Subgroup	D₃[Si₂O₅](OH)₄ D= Mg, Fe, Ni, Mn, Al, Zn
B	Boron
B	ⓘ Schorl	Na(Fe₃²⁺)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
O	Oxygen
O	ⓘ Schorl	Na(Fe₃²⁺)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
O	ⓘ Quartz	SiO₂
O	ⓘ Serpentine Subgroup	D₃[Si₂O₅](OH)₄ D= Mg, Fe, Ni, Mn, Al, Zn
Na	Sodium
Na	ⓘ Schorl	Na(Fe₃²⁺)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
Mg	Magnesium
Mg	ⓘ Serpentine Subgroup	D₃[Si₂O₅](OH)₄ D= Mg, Fe, Ni, Mn, Al, Zn
Al	Aluminium
Al	ⓘ Schorl	Na(Fe₃²⁺)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
Al	ⓘ Serpentine Subgroup	D₃[Si₂O₅](OH)₄ D= Mg, Fe, Ni, Mn, Al, Zn
Si	Silicon
Si	ⓘ Schorl	Na(Fe₃²⁺)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
Si	ⓘ Quartz	SiO₂
Si	ⓘ Serpentine Subgroup	D₃[Si₂O₅](OH)₄ D= Mg, Fe, Ni, Mn, Al, Zn
Mn	Manganese
Mn	ⓘ Serpentine Subgroup	D₃[Si₂O₅](OH)₄ D= Mg, Fe, Ni, Mn, Al, Zn
Fe	Iron
Fe	ⓘ Schorl	Na(Fe₃²⁺)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
Fe	ⓘ Serpentine Subgroup	D₃[Si₂O₅](OH)₄ D= Mg, Fe, Ni, Mn, Al, Zn
Ni	Nickel
Ni	ⓘ Serpentine Subgroup	D₃[Si₂O₅](OH)₄ D= Mg, Fe, Ni, Mn, Al, Zn
Zn	Zinc
Zn	ⓘ Serpentine Subgroup	D₃[Si₂O₅](OH)₄ D= Mg, Fe, Ni, Mn, Al, Zn

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

Paleozoic - Proterozoic

251.902 - 2500 Ma

ID: 2824500

Ultramafic Rocks

Age: to Triassic (251.902 - 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.

Comments: Original map source: In 1995 the Water Resources Division of the U.S. Geological Survey digitized the geologic map of Maryland from the 1968 paper map (Reference MD001). Information about products from the Maryland Geological Survey can be found at http://www.mgs.md.gov/.

Lithology: Major:{serpentinite}, Incidental:{dunite, peridotite, pyroxenite, gabbro}

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]

Cambrian - Neoproterozoic

485.4 - 1000 Ma

ID: 3190533

Precambrian-Phanerozoic sedimentary and volcanic rocks

Age: Neoproterozoic to Cambrian (485.4 - 1000 Ma)

Lithology: Metasedimentary/metavolcanic schist

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. [154]

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

References

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Year (asc) Year (desc) Author (A-Z) Author (Z-A)

Singewald, J. T. (1928) Notes on feldspar, quartz, chrome and manganese in Maryland: Maryland Geological Survey vol. 12 part 2: 107.

Pearre, N. & A. V. Heyl (1960) Mineral deposits in serpentine rocks of the Piedmont Upland, Maryland, Pennsylvania and Delaware: U. S. Geological Survey: Bulletin 1082K: 813.

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