Geology

National Capital Area National History Collections - Geology

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Pan

2117 x 2000
0.4 MB

Gold Float Specimen

1429 x 2500
0.3 MB

Quartz with Gold

2349 x 2054
0.4 MB

Gold Bead

441 x 401
0.0 MB

Chesapeake & Ohio Canal, Conoc...

2230 x 1800
0.3 MB