Chief Bwana:
Serrated Impressions
A W (Tony) Grover:
Northern Badwater from Queen of Sheba mine - Death Valley
A W (Tony) Grover:
Southern Death Valley
rwgabbro1:
Botany of the Carolinas Coastal Plain, Part 18: Up a Not-So-Lazy River, Cliffs of the Neuse State Park, North Carolina, USA
Mount Fuji Man:
Stalactites and stalagmites
Mount Fuji Man:
Stalactites meet stalagmites
A W (Tony) Grover:
Old talc mine - Death Valley
murielrocher:
Praia da Rocha, Portugal
rwgabbro1:
Geology of Fieldstone & Cobblestone Buildings, Part 20: Another Overall View of the Herrick House, Rockford, Illinois, USA (1847)
Chief Bwana:
Bounding surfaces
rwgabbro1:
The Geology of Terra-Cotta, Part 15: Putting One's Best Face Forward, the Ansorge Fish Market Building, Kenosha, Wisconsin, USA (ca. 1922)
Nathan Dunne:
The Cheesewring on Bodmin Moor, Cornwall.
Chief Bwana:
Tree-t for geophysicists
rwgabbro1:
The Bounty of Bell Smith Springs, Part 10: Room with a View, Shawnee National Forest, Illinois, USA
Chief Bwana:
Butte factory
rwgabbro1:
Architectural Geology of Southwestern Wisconsin, Part 15: Zooming in on the Soldiers' and Sailors' Civil War Monument, Monroe, Wisconsin, USA (1913)
Bernard Spragg:
PAPAROA NATIONAL PARK. Punakaiki .
rwgabbro1:
Architectural Geology of Paestum, Part 4: Taking the Long View, Magna Graecia, Campania, Italy
rwgabbro1:
The Brownstone Chronicles, Part 24: Close-Up of the Central Façade, Old City Hall, Marquette, Upper Peninsula of Michigan, USA (1894)
ursonroute66:
Capitol Reef National Park
rwgabbro1:
From Persimmon Gap to Boquillas Canyon, Part 13: Oh, What a Beautiful Faulting; Big Bend National Park, Texas, USA