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| Keywords: WalcottQuarry080509.jpg en Walcott Quarry of the Burgess Shale Middle Cambrian British Columbia The photo shows the Walcott Quarry Shale Member The white parallel vertical streaks are remnants of drill holes made during excavations in mid-1990s own Mark A Wilson Wilson44691 Department of Geology The College of Wooster http //www3 wooster edu/geology/MWilson html 2009-08-05 Burgess Shale | ||||
