Wills Creek Formation facts for kids
Quick facts for kidsWills Creek Formation
Stratigraphic range: Silurian
Tight anticlinal fold in the Wills Creek Formation, along Route 22, Neff, Huntingdon County, Pennsylvania
|Overlies||Bloomsburg Formation and Williamsport Formation|
|Other||Siltstone, limestone, dolomite|
|Extent||Pennsylvania, Maryland, Virginia, West Virginia|
|Named for||Wills Creek at Cumberland, Allegany County, Maryland|
|Named by||P. R. Uhler, 1905|
The Wills Creek is defined as a moderately well bedded greenish-gray shale containing local limestone and sandstone zones, or more specifically as an olive to yellowish-gray, thin-bedded sandstone, calcareous shale, dolomite, argillaceous limestone, and sandstone. Red shale and siltstone occur in the lower part of the formation. The formation has a thickness between 450 feet and 600 feet in Maryland and 445 to 620 feet in Pennsylvania.
The Wills Creek forms the bedrock of the valley around and to the east of Lewistown, Pennsylvania.
The Wills Creek Limestone contain fossils from the Pridoli to the Ludlow epoch, or 422.9 to 418.1 Ma.
Dean et al. (1985) describe the Wills Creek as sparsely fossiliferous.
Conodonts have been identified in the Wills Creek in Virginia (Ozarkodina snajdri crispa Zone).
- Type section at Wills Creek at Cumberland, Allegany County, Maryland
- Roundtop Hill, Maryland, along railroad grade
The Wills Creek is a poor source of construction material and is only suitable as common fill.
Wills Creek Formation Facts for Kids. Kiddle Encyclopedia.