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.Conestoga Formation, USGS Mineral Resources On-Line Spatial Data
Type section Named from outcrops along Conestoga River, Lancaster County, Pennsylvania.
References