Warrior Formation

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.

Fossils

 * Trilobites, 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.
 * Brachiopods
 * Cryptozoon, a type of trace fossil
 * Stromatolites

Notable Exposures

 * Type section: Warrior Creek (formerly Warriorsmark Creek),Huntingdon County
 * Section near Waddle, Pennsylvania.

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