Basalt Columns Basalt Columns ; Basalt is lava that cooled on the surface of the earth. Often the flows harden into polygonal columns like those shown here. back to all boulders and...
Cabinet Gorge Boulders Cabinet Gorge Boulders ; Multicolored landscape boulders. back to all boulders &...
Colorado Buff Boulders Colorado Buff Boulders ; Light-gray to buff and reddish sandstone boulders. back to all boulders &...
