Image 1: Canadian Rockies
Image 2: Northern California coast
Image 3: Near Forcalquier, Provence
Image 4: Northern California coast
Image 5: Near Forcalquier, Provence
Image 6: Crumbling cliff and oak tree near Forcalquier, Provence
Image 7: Northern California coast
Image 8: Near Forcalquier, Provence
Image 9: Near Forcalquier, Provence
Image 10: Chiracahua National Monument, Arizona
The yellow color is a lichen on the rocks.
Image 11: Enchanted Rock State Park, Texas
The green, orange and black colors are lichen growing on the rock
Image 12: Enchanted Rock State Park, Texas
The green, orange and black colors are lichen growing on the rock
Image 13: Glacial polish on granite, Yosemite National Park
Image 14: Joshua Tree National Monument, California
Image 15: Near Forcalquier, Provence
Image 16: Zion National Park, Utah
Image 17: Zion National Park, Utah
Image 18: Sandstone in the southwest region
Image 19: Basalt columns, southern British Columbia
Image 20: Cracked limestone, Provence
Image 21: A giant granite boulder, Stanislaus National Forest, Sierra Nevada
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