U.S. Geological Survey:
DSC_0001
U.S. Geological Survey:
DSC_0003
U.S. Geological Survey:
DSC_0006
U.S. Geological Survey:
DSC_0007
U.S. Geological Survey:
DSC_0010
U.S. Geological Survey:
DSC_0013
U.S. Geological Survey:
DSC_0015
U.S. Geological Survey:
DSC_0014
U.S. Geological Survey:
DSC_0017
U.S. Geological Survey:
DSC_0033
U.S. Geological Survey:
DSC_0036
U.S. Geological Survey:
DSC_0038
U.S. Geological Survey:
DSC_0041
U.S. Geological Survey:
DSC_0044
U.S. Geological Survey:
DSC_0046
U.S. Geological Survey:
DSC_0053
U.S. Geological Survey:
DSC_0057
U.S. Geological Survey:
DSC_0069
U.S. Geological Survey:
DSC_0076
U.S. Geological Survey:
DSC_0079
U.S. Geological Survey:
DSC_0082
U.S. Geological Survey:
DSC_0093
U.S. Geological Survey:
DSC_0098
U.S. Geological Survey:
DSC_0120
U.S. Geological Survey:
Poster 1
U.S. Geological Survey:
DSC_0102
U.S. Geological Survey:
Poster 17
U.S. Geological Survey:
Poster 20
U.S. Geological Survey:
Poster 28_002
U.S. Geological Survey:
Poster 34_002
