Keywords: Petroxestes borings Ordovician.jpg Petroxestes borings in an Upper Ordovician hardground southern Ohio Photograph taken by Mark A Wilson Department of Geology The College of Wooster http //www3 wooster edu/geology/MWilson html 2007-05-09 Wilson44691 wikipedia en Wilson44691 original upload log page en wikipedia MWg jpg 2007-05-09 01 47 Wilson44691 536×786×8 296881 bytes <nowiki>I took this photograph </nowiki> original upload log wikitable date/time username resolution size edit summary ---- 2008-03-30T01 42 33Z User File Upload Bot Magnus Manske 536×786 289 92Kb <nowiki> en wikipedia Photograph taken by Mark A Wilson Department of Geology The College of Wooster http //www3 wooster edu/geology/MWilson html Transferred from http //en wikipedia org en wik</nowiki> Hardground Trace fossils Bioerosion Cincinnatian |