Warrior Formation

Warrior Formation
Stratigraphic range: Cambrian
Outcrop showing cryptozoa layers at Bakers Summit, Bedford County
Type	sedimentary
Underlies	Gatesburg Formation
Overlies	Pleasant Hill Formation
Thickness	250 ft at type sections, [1] 1350 ft in Nittany Arch, [2] 746 ft at Waddle. [3]
Lithology
Primary	limestone
Other	shale, siltstone, sandstone
Location
Region	Appalachian Basin
Country	United States
Extent	Bedford Co., Blair Co., Centre Co., Huntingdon Co. [4]
Type section
Named for	Warrior Run, Blair County
Named by	C. 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

• Trilobites, ^[1] including Crepicephalus , Cedaria , Llanoaspidella , ^[3] 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. ^[6]
• Brachiopods ^[3]
• Cryptozoon, a type of trace fossil ^{[1] [6]}
• Stromatolites ^[5]

Notable Exposures

• Type section: Warrior Creek (formerly Warriorsmark Creek),Huntingdon County ^[1]
• Section near Waddle, Pennsylvania. ^[3]

Age

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

References

1. 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. 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. Berg, T.M. (compiler), 1980, Geologic map of Pennsylvania: Pennsylvania Geological Survey State Map, 4th series, 1, 1 sheet, scale 1:250,000
6. 1 2 Charles Butts, 1945. Hollidaysburg-Huntingdon folio, Pennsylvania, Folios of the Geologic Atlas 227. United States Geological Survey.