Wikimedi'Òc

Columnar-jointed basalt (Columbia River Flood Basalt, Miocene, ~15-17 Ma; Mud Hollow, Oregon, USA) 19.jpg - Ser Amantio di Nicolao

Columnar-jointed basalt (Columbia River Flood Basalt, Miocene, ~15-17 Ma; Mud Hollow, Oregon, USA) 18.jpg - Ser Amantio di Nicolao

Columnar-jointed basalt (Columbia River Flood Basalt, Miocene, ~15-17 Ma; Mud Hollow, Oregon, USA) 17.jpg - Ser Amantio di Nicolao

Columnar-jointed basalt (Columbia River Flood Basalt, Miocene, ~15-17 Ma; Mud Hollow, Oregon, USA) 16.jpg - Ser Amantio di Nicolao

Columnar-jointed basalt (Columbia River Flood Basalt, Miocene, ~15-17 Ma; Mud Hollow, Oregon, USA) 15.jpg - Ser Amantio di Nicolao

Columnar-jointed basalt (Columbia River Flood Basalt, Miocene, ~15-17 Ma; Mud Hollow, Oregon, USA) 14.jpg - Ser Amantio di Nicolao

Columnar-jointed basalt (Columbia River Flood Basalt, Miocene, ~15-17 Ma; Mud Hollow, Oregon, USA) 13.jpg - Ser Amantio di Nicolao

Columnar-jointed basalt (Columbia River Flood Basalt, Miocene, ~15-17 Ma; Mud Hollow, Oregon, USA) 11.jpg - Ser Amantio di Nicolao

Columnar-jointed basalt (Columbia River Flood Basalt, Miocene, ~15-17 Ma; Mud Hollow, Oregon, USA) 12.jpg - Ser Amantio di Nicolao

Columnar-jointed basalt (Columbia River Flood Basalt, Miocene, ~15-17 Ma; Mud Hollow, Oregon, USA) 10.jpg - Ser Amantio di Nicolao

Columnar-jointed basalt (Columbia River Flood Basalt, Miocene, ~15-17 Ma; Mud Hollow, Oregon, USA) 8.jpg - Ser Amantio di Nicolao

Columnar-jointed basalt (Columbia River Flood Basalt, Miocene, ~15-17 Ma; Mud Hollow, Oregon, USA) 9.jpg - Ser Amantio di Nicolao

Columnar-jointed basalt (Columbia River Flood Basalt, Miocene, ~15-17 Ma; Mud Hollow, Oregon, USA) 7.jpg - Ser Amantio di Nicolao

Columnar-jointed basalt (Columbia River Flood Basalt, Miocene, ~15-17 Ma; Mud Hollow, Oregon, USA) 6.jpg - Ser Amantio di Nicolao

Columnar-jointed basalt (Columbia River Flood Basalt, Miocene, ~15-17 Ma; Mud Hollow, Oregon, USA) 5.jpg - Ser Amantio di Nicolao

Columnar-jointed basalt (Columbia River Flood Basalt, Miocene, ~15-17 Ma; Mud Hollow, Oregon, USA) 4.jpg - Ser Amantio di Nicolao

Columnar-jointed basalt (Columbia River Flood Basalt, Miocene, ~15-17 Ma; Mud Hollow, Oregon, USA) 2.jpg - Ser Amantio di Nicolao

Columnar-jointed basalt (Columbia River Flood Basalt, Miocene, ~15-17 Ma; Mud Hollow, Oregon, USA) 3.jpg - Ser Amantio di Nicolao

Columnar-jointed basalt (Columbia River Flood Basalt, Miocene, ~15-17 Ma; Mud Hollow, Oregon, USA) 1.jpg - Ser Amantio di Nicolao