USGS Bench Mark "YNKTN 1466" 1896 Jerry Penry October 4, 2007 Photos by Gene Thomsen. © Jerry Penry 2009
1896 Jerry Penry October 4, 2007 Photos by Gene Thomsen. © Jerry Penry 2009
Jerry Penry October 4, 2007 Photos by Gene Thomsen. © Jerry Penry 2009
Photos by Gene Thomsen. © Jerry Penry 2009
© Jerry Penry 2009
