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From Wikipedia, the free encyclopedia
The Weverton Formation is a quartzite geologic formation in Maryland, Virginia, West Virginia, and Pennsylvania. It is considered the basal member of the Chilhowee Group.[1] The Weverton Formation dates back to the Cambrian period.
Weverton Formation | |
---|---|
Stratigraphic range: Cambrian | |
Type | Formation |
Unit of | Chilhowee Group[1] |
Sub-units | Buzzard Knob Member, Maryland Heights Member, and Owens Creek Member[2] |
Underlies | Harpers Formation |
Overlies | Catoctin Formation and London Conglomerate |
Lithology | |
Primary | sandstone, quartzite, |
Other | shale, siltstone |
Location | |
Region | Appalachia, Mid-Atlantic United States, and Southeastern United States |
Country | United States |
Extent | Maryland, Pennsylvania, Virginia, and West Virginia[3] |
Type section | |
Named for | Weverton, Maryland |
The Weverton Formation is composed of three members: the Buzzard Knob Member, Maryland Heights Member, and Owens Creek Member.[2] The Buzzard Knob member is a coarse-grained quartzite with pervasive cross-beds. The Maryland Heights member consists of metamorphosed siltstone, coarse-grained metamorphosed greywacke, and quartzite. The Owens Creek Member is a coarse-grained to conglomeratic metamorphosed greywacke.[2][4] The formation was deposited in an alluvial environment.[4]
The Weverton Formation is considered the main ridge forming unit in the Blue Ridge Mountains of Maryland.[2]
The Weverton Formation is sometimes incorrectly spelled Weaverton and has been called the Weverton Sandstone or the Weverton Quartzite.[1][5][6] It was divided into three members originally called the lower, middle, and upper member.[1][2] These members were informally called the Loft Mountain Member, the Oregon Hollow Member, and the Dismal Hollow Member before receiving their formal names in 1992.[2]
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