Warrior Formation Explained

Warrior Formation
Type:	sedimentary
Period:	Cambrian
Prilithology:	limestone
Otherlithology:	shale, siltstone, sandstone
Namedfor:	Warrior Run, Blair County
Namedby:	C. Butts, 1918^[1]
Region:	Appalachian Basin
Country:	United States
Underlies:	Gatesburg Formation
Thickness:	250 ft at type sections, 1350 ft in Nittany Arch,^[2] 746 ft at Waddle.
Extent:	Bedford Co., Blair Co., Centre Co., Huntingdon Co.^[3]

The Cambrian Warrior Formation is a mapped limestone bedrock unit in Pennsylvania.

Description

The Warrior Formation is described by Berg and others as gray, thin- to medium-bedded, fossiliferous, cyclic limestone bearing stromatolites, interbedded with shale, siltstone, and sandstone.^[4]

Fossils

Trilobites,^[1] including Crepicephalus, Cedaria, Llanoaspidella, and Blountia kindlei Resser, Coosella brevis Resser, Kingstonia ara (Walcott), K. kindlei Resser, and other Kingstonia species, Menomonia avitas (Walcott), Blountia, Modocia, Lonchocephalus, Genevievella, Pemphigaspis.^[5]
Brachiopods
Cryptozoon, a type of trace fossil^[1] ^[5]
Stromatolites^[4]

Notable Exposures

Type section: Warrior Creek (formerly Warriorsmark Creek),Huntingdon County
Section near Waddle, Pennsylvania.^[6]

Age

Relative age dating places the Warrior Formation in the middle to late Cambrian.

Notes and References

Butts, Charles, 1918, Geologic section of Blair and Huntingdon Counties, central Pennsylvania: American Journal of Science, 4th series, v. 46, p. 523-537.
Wilson, J.L., 1952, Upper Cambrian stratigraphy in the central Appalachians: Geological Society of America Bulletin, v. 63, no. 3, p. 275-322.
https://mrdata.usgs.gov/geology/state/sgmc-unit.php?unit=PACAw%3B15 USGS Mineral Resources On-Line Spatial Data
Berg, T.M. (compiler), 1980, Geologic map of Pennsylvania: Pennsylvania Geological Survey State Map, 4th series, 1, 1 sheet, scale 1:250,000 https://web.archive.org/web/20140524011640/http://www.dcnr.state.pa.us/topogeo/publications/pgspub/map/map1/index.htm
Charles Butts, 1945. Hollidaysburg-Huntingdon folio, Pennsylvania, Folios of the Geologic Atlas 227. United States Geological Survey.
Tasch, Paul, 1951, Fauna and Paleoecology of the Upper Cambrian Warrior Formation of Central Pennsylvania, Journal of Paleontology, Vol. 25, No. 3, pp. 275-306, pls. 44-47, May 1951 abstract