Robert Burnham:
bomb_sag-2
Robert Burnham:
DSC_7009
Robert Burnham:
calcite veins [DSC_11956.1]
Robert Burnham:
Redwall rumpled [DSC_12881]
Robert Burnham:
volcanic breccia
Robert Burnham:
DSC_13623
Robert Burnham:
DSC_13622
Robert Burnham:
DSC_13618
Robert Burnham:
pavement [DSC_13954]
Robert Burnham:
Mount St. Helens ash [DSC_13889]
Robert Burnham:
fractured lava boulder [DSC_13875]