Conestoga Formation



The Conestoga Formation is a geologic formation in Pennsylvania.

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.

Type section
Named from outcrops along Conestoga River, Lancaster County, Pennsylvania.