Conestoga Formation
Geologic formation in Pennsylvania
From Wikipedia, the free encyclopedia
The Conestoga Formation is a geologic formation in Pennsylvania.
| Conestoga Formation | |
|---|---|
| Stratigraphic range: Middle Cambrian to Early Ordovician | |
 Thick-bedded crystalline limestone passing into finely laminated slaty limestone typical of the Conestoga, in quarry 1 mile northwest of Bellemont. | |
| Type | sedimentary, metamorphic |
| Overlies | Vintage Dolomite |
| Lithology | |
| Primary | limestone |
| Other | phyllite, conglomerate |
| Location | |
| Region | Pennsylvania |
| Country | United States |
| Type section | |
| Named by | Knopf and Jonas (1923) |
Description
Light-gray, thin-bedded, impure, contorted limestone having shale partings; conglomeratic at base; in Chester Valley, includes micaceous limestone in upper part, phyllite in middle, and alternating dolomite and limestone in lower part.[1]
Type section
Named from outcrops along Conestoga River, Lancaster County, Pennsylvania.