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Mineral Resources On-Line Spatial Data

Chilhowee Group; Weverton Formation

Weverton Formation - Interbedded white to dark gray, thin-bedded, micaceous, ferruginous, and sericitic quartzites, phyllites, and white, thick-bedded, ledge-making quartzites; some gray to brown ferruginous quartz conglomerate and purple-banded phyllite; thickness approximately 100 feet in south, increases to 425 feet in north.
StateMaryland
NameChilhowee Group; Weverton Formation
Geologic ageLate Precambrian - Cambrian
Original map labelwf
Primary rock typequartzite
Secondary rock typephyllite
Other rock typesconglomerate
Lithologic constituents
Major
Metamorphic > Metasedimentary > Metaclastic > Quartzite
Minor
Sedimentary > Clastic > Conglomeratequartz conglomerate
Metamorphic > Metasedimentary > Metaclastic > Phyllite
Map references
Cleaves, E.T., Edwards, J., Jr., Glaser, J.D., 1968, Geologic Map of Maryland: Maryland Geological Survey, Baltimore, Maryland, scale 1:250,000.
Unit references
Cleaves, E.T., Edwards, J., Jr., Glaser, J.D., 1968, Geologic Map of Maryland: Maryland Geological Survey, Baltimore, Maryland, scale 1:250,000.
Unpublished digital version of the Maryland state geologic map that was digitized by the USGS Water Resources Office in Towson, MD
Geographic coverageFrederick - Washington

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