Bloomsburg Formation
The Silurian Bloomsburg Formation is a mapped bedrock unit in Pennsylvania, New Jersey, New York and Maryland. It is named for the town of Bloomsburg, Pennsylvania, in which it was first described. The Bloomsburg marked the first occurrence of red sedimentary rocks in the Appalachian Basin.
| Bloomsburg Formation | |
|---|---|
| Stratigraphic range: Gorstian - Ludfordian ~ | |
A hand sample of the Bloomsburg Siltstone from Port Clinton, Pennsylvania | |
| Type | sedimentary |
| Underlies | Wills Creek Formation |
| Overlies | Clinton Group, McKenzie Formation, Mifflintown Formation, and Shawangunk Formation |
| Thickness | up to 5,000 feet (1,520 m) |
| Lithology | |
| Primary | Siltstone |
| Other | Shale, Claystone, Sandstone, Limestone |
| Location | |
| Region | Appalachian Basin of eastern North America |
| Extent | Maryland, New Jersey, New York, Pennsylvania, and Virginia |
| Type section | |
| Named for | Bloomsburg, Pennsylvania |
| Named by | I. C. White, 1883 |
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