Keywords: OrdOutcropTN.JPG en Outcrop of Upper Ordovician limestone and minor shale central Tennessee; College of Wooster students Photograph taken by Mark A Wilson Department of Geology The College of Wooster http //www3 wooster edu/geology/MWilson html en wikipedia 2007-05-12 Wilson44691 wikipedia en Wilson44691 original upload log page en wikipedia OrdOutcropTN JPG 2007-05-12 23 55 Wilson44691 700×818×8 285461 bytes <nowiki>I took this photograph </nowiki> Limestone Ordovician geology Stratigraphy Geology of Tennessee |