Juniata Formation | |
---|---|
Stratigraphic range: Late Ordovician | |
Type | sedimentary |
Underlies | Oswego Formation and Tuscarora Formation |
Overlies | Bald Eagle Formation |
Thickness | 400–1,125 ft (122–343 m) |
Lithology | |
Primary | sandstone, siltstone, shale |
Location | |
Region | Appalachian Mountains |
Extent | Maryland, Pennsylvania, Tennessee, Virginia,[1] and West Virginia |
Type section | |
Named for | Juniata River in Pennsylvania |
Named by | Darton and Taff[2] |
The Ordovician Juniata Formation is a mapped bedrock unit in Pennsylvania, West Virginia, Virginia, Tennessee, and Maryland. It is a relative slope-former occurring between the two prominent ridge-forming sandstone units: the Tuscarora Formation and the Bald Eagle Formation in the Appalachian Mountains.