Lilian Alizert:
Fentes de tension sigmoïdes
John W Little:
Erosion gone wild
John W Little:
Fluted lava
John W Little:
Fluted lava, Grand Canyon
adventures_with_martin:
Scablands near Cow Creek Trestle
Kelly Cheng:
P5210439
David A. Riggs:
Stream Trunk
David A. Riggs:
Double Waterfall Pillar
David A. Riggs:
Double Waterfall
David A. Riggs:
Ceiling Collapse
David A. Riggs:
Upstream Trunk
David A. Riggs:
Upstream Trunk
David A. Riggs:
Upstream Trunk
David A. Riggs:
Upstream Trunk
David A. Riggs:
Upstream Trunk
Doug McCarty:
CanyonDigMary
David A. Riggs:
"Voyager" by Tom Hay