Earth:Weverton Formation
| 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 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.
Description
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]
History
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]
References
- ↑ 1.0 1.1 1.2 1.3 King, Philip B. (1950). "Geology of the Elkton area, Virginia". U.S. Geological Survey Professional Paper 230: 17–19. https://pubs.usgs.gov/pp/0230/report.pdf. Retrieved 29 June 2018.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 Brezinski, David K. (1992). "Lithostratigraphy of the western Blue Ridge cover rocks in Maryland". Maryland Geological Survey Report of Investigations 55: 9–18. http://www.mgs.md.gov/reports/RI_55.pdf. Retrieved 29 June 2018.
- ↑ Paleozoic Sedimentary Successions of the Virginia Valley & Ridge and Plateau
- ↑ 4.0 4.1 Southworth, Scott; Brezinski, Donald K. (1996). "Geology of the Harpers Ferry quadrangle, Virginia, Maryland, and West Virginia". U.S. Geological Survey Bulletin 2123: 12–13. https://pubs.usgs.gov/bul/2123/report.pdf. Retrieved 29 June 2018.
- ↑ Williams, G. H.; Clark, W. B. (1893). Maryland, its resources, industries, and institutions; geology. Baltimore, MC: Sun job printing office. p. 68. https://books.google.com/books?id=DkgVAAAAYAAJ&pg. Retrieved 29 June 2018.
- ↑ Burton, William C.; Froelich, Albert J.; Pomeroy, John S.; Lee, K. Y. (1995). "Geology of the Waterford quadrangle, Virginia and Maryland, and the Virginia part of the Point of Rocks quadrangle". U.S. Geological Survey Bulletin 2095: 15–16. https://pubs.usgs.gov/bul/2095/report.pdf. Retrieved 29 June 2018.
Template:Chronostratigraphy of Virginia Template:Stratigraphic column of West Virginia
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