Warrior Formation

Warrior Formation
Stratigraphic range: Cambrian
Outcrop showing cryptozoa layers at Bakers Summit, Bedford County
Typesedimentary
UnderliesGatesburg Formation
OverliesPleasant Hill Formation
Thickness250 ft at type sections,[1] 1350 ft in Nittany Arch,[2] 746 ft at Waddle.[3]
Lithology
Primarylimestone
Othershale, siltstone, sandstone
Location
RegionAppalachian Basin
CountryUnited States
ExtentBedford Co., Blair Co., Centre Co., Huntingdon Co.[4]
Type section
Named forWarrior Run, Blair County
Named byC. Butts, 1918[1]

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.[5]

Fossils

Cryptozoon undulatum from Bakers Summit

Notable Exposures

Age

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

References

  1. ^ a b c d e Butts, Charles, 1918, Geologic section of Blair and Huntingdon Counties, central Pennsylvania: American Journal of Science, 4th series, v. 46, p. 523-537.
  2. ^ Wilson, J.L., 1952, Upper Cambrian stratigraphy in the central Appalachians: Geological Society of America Bulletin, v. 63, no. 3, p. 275-322.
  3. ^ a b c d 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
  4. ^ USGS Mineral Resources On-Line Spatial Data, retrieved 4 Mar. 2011
  5. ^ a b Berg, T.M. (compiler), 1980, Geologic map of Pennsylvania: Pennsylvania Geological Survey State Map, 4th series, 1, 1 sheet, scale 1:250,000 [1]
  6. ^ a b Charles Butts, 1945. Hollidaysburg-Huntingdon folio, Pennsylvania, Folios of the Geologic Atlas 227. United States Geological Survey.


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