Warrior Formation

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

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]

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.