Warrior Formation
Encyclopedia
The Cambrian
Warrior Formation is a mapped limestone
bedrock
unit in Pennsylvania
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s, interbedded with shale, siltstone, and sandstone.
Cambrian
The Cambrian is the first geological period of the Paleozoic Era, lasting from Mya ; it is succeeded by the Ordovician. Its subdivisions, and indeed its base, are somewhat in flux. The period was established by Adam Sedgwick, who named it after Cambria, the Latin name for Wales, where Britain's...
Warrior Formation is a mapped limestone
Limestone
Limestone is a sedimentary rock composed largely of the minerals calcite and aragonite, which are different crystal forms of calcium carbonate . Many limestones are composed from skeletal fragments of marine organisms such as coral or foraminifera....
bedrock
Bedrock
In stratigraphy, bedrock is the native consolidated rock underlying the surface of a terrestrial planet, usually the Earth. Above the bedrock is usually an area of broken and weathered unconsolidated rock in the basal subsoil...
unit in Pennsylvania
Pennsylvania
The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...
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Description
The Warrior Formation is described by Berg and others as gray, thin- to medium-bedded, fossiliferous, cyclic limestone bearing stromatoliteStromatolite
Stromatolites or stromatoliths are layered accretionary structures formed in shallow water by the trapping, binding and cementation of sedimentary grains by biofilms of microorganisms, especially cyanobacteria ....
s, interbedded with shale, siltstone, and sandstone.
Fossils
- Trilobites, including CrepicephalusCrepicephalusCrepicephalus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period....
, Cedaria, and LlanoaspidellaLlanoaspidellaLlanoaspidella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived from 501 to 490 million years ago during the Dresbachian faunal stage of the late Cambrian Period.... - Brachiopods
- Cryptozoon
- Stromatolites
Notable Exposures
- Type section: Warrior Run, 1 mile east of WilliamsburgWilliamsburg, PennsylvaniaWilliamsburg in Morrisons Cove, is a borough in Blair County, Pennsylvania, United States. The population was 1,345 at the 2000 census. It is part of the Altoona, PA Metropolitan Statistical Area.-History:...
, Blair CountyBlair County, Pennsylvania-Significant Topographic Features:*Brush Mountain*Logan Valley*Morrison Cove*Tussey Mountain-Demographics:As of the census of 2000, there were 129,144 people, 51,518 households, and 34,877 families residing in the county. The population density was 246 people per square mile . There were 55,061... - Warrior Creek, east of Warriors Mark, Huntingdon CountyHuntingdon County, PennsylvaniaHuntingdon County is a county located in the U.S. state of Pennsylvania. In 2010, its population was 45,913.Huntingdon County was created on September 20, 1787, from part of Bedford County. Its county seat is Huntingdon.-Geography:According to the U.S...
- Section near Waddle, PennsylvaniaWaddle, PennsylvaniaWaddle is a populated place in Patton Township, Centre County, Pennsylvania, about 3 miles northwest of State College, and located on Buffalo Run Road .-References:...
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