keweenaw
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Amygdaloidal basalt (Portage Lake Volcanic Series, upper Mesoproterozoic, 1.093 to 1.097 Ga; Keweenaw Peninsula, Upper Peninsula of Michigan, USA) 7
by James St. John
by James St. John
サイズ変更など
Amygdaloidal basalt (Portage Lake Volcanic Series, upper Mesoproterozoic, 1.093 to 1.097 Ga; Keweenaw Peninsula, Upper Peninsula of Michigan, USA) 31
by James St. John
by James St. John
Native silver in hydrothermal vein rock (Proterozoic; Silver Islet Mine, Lake Superior, Ontario, Canada) 4
by James St. John
by James St. John
End-Pleistocene large pothole in tholeiitic basalt (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Bake Oven Pothole, Interstate State Park, Taylors Falls, Minnesota, USA) 12
by James St. John
by James St. John
End-Pleistocene large pothole in tholeiitic basalt (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Lily Pond Pothole, Interstate State Park, Taylors Falls, Minnesota, USA) 7
by James St. John
by James St. John
Leaving Copper Harbor for Isle Royale National Park
by Joetography LLC
by Joetography LLC
End-Pleistocene pothole in tholeiitic basalt (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Interstate State Park, Taylors Falls, Minnesota, USA) 4
by James St. John
by James St. John
End-Pleistocene large pothole in tholeiitic basalt (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Bake Oven Pothole, Interstate State Park, Taylors Falls, Minnesota, USA) 11
by James St. John
by James St. John
Epidote-lined vug in basalt (Portage Lake Volcanic Series, upper Mesoproterozoic, 1.093 to 1.097 Ga; Centennial Mine, Keweenaw Peninsula, Upper Peninsula of Michigan, USA) 2
by James St. John
by James St. John
End-Pleistocene large pothole in tholeiitic basalt (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Bake Oven Pothole, Interstate State Park, Taylors Falls, Minnesota, USA) 6
by James St. John
by James St. John
Vesicular basalt (Quaternary; Snake River Plain, Idaho, USA) 4
by James St. John
by James St. John
End-Pleistocene large pothole in tholeiitic basalt (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Interstate State Park, Taylors Falls, Minnesota, USA) 14
by James St. John
by James St. John
Silver (Mesoproterozoic, 1.05-1.06 Ga; South Kearsarge Mine, Houghton County, Upper Peninsula of Michigan, USA)
by James St. John
by James St. John
End-Pleistocene large pothole in tholeiitic basalt (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Bake Oven Pothole, Interstate State Park, Taylors Falls, Minnesota, USA) 3
by James St. John
by James St. John
Rhyolite (Palisade Rhyolite, North Shore Volcanic Group, Mesoproterozoic, 1096-1097 Ma; Rt. 1 roadcut just north of Ilgen City, Minnesota, USA) 2
by James St. John
by James St. John
Copper skull (Mesoproterozoic, 1.05-1.06 Ga; Calumet and Hecla Mine, Calumet, Michigan, USA) 2
by James St. John
by James St. John
Lateral breach in an end-Pleistocene large pothole in tholeiitic basalt (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Bake Oven Pothole, Interstate State Park, Taylors Falls, Minnesota, USA) 1
by James St. John
by James St. John
End-Pleistocene large pothole in tholeiitic basalt (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Bake Oven Pothole, Interstate State Park, Taylors Falls, Minnesota, USA) 4
by James St. John
by James St. John
End-Pleistocene pothole in tholeiitic basalt (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Interstate State Park, Taylors Falls, Minnesota, USA) 3
by James St. John
by James St. John
Silver and copper (Mesoproterozoic, 1.05-1.06 Ga; Upper Peninsula of Michigan, USA)
by James St. John
by James St. John
End-Pleistocene large pothole in tholeiitic basalt (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Interstate State Park, Taylors Falls, Minnesota, USA) 11
by James St. John
by James St. John
End-Pleistocene large pothole in tholeiitic basalt (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Interstate State Park, Taylors Falls, Minnesota, USA) 7
by James St. John
by James St. John
End-Pleistocene large pothole in tholeiitic basalt (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Bake Oven Pothole, Interstate State Park, Taylors Falls, Minnesota, USA) 5
by James St. John
by James St. John
Copper (Mesoproterozoic, 1.05-1.06 Ga; Baltic Mine, Baltic, Michigan, USA)
by James St. John
by James St. John
End-Pleistocene large pothole in tholeiitic basalt (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Interstate State Park, Taylors Falls, Minnesota, USA) 13
by James St. John
by James St. John
Baptism River Basalt (North Shore Volcanic Group, Mesoproterozoic, ~1097 Ma; Split Rock Lighthouse, Minnesota, USA) 2
by James St. John
by James St. John
Silver (Kearsarge Lode, Mesoproterozoic, 1.05-1.06 Ga; Houghton County, Upper Peninsula of Michigan, USA)
by James St. John
by James St. John
Copper with silver crystals (Mesoproterozoic, 1.05-1.06 Ga; Wolverine Mine, Upper Peninsula of Michigan, USA)
by James St. John
by James St. John
End-Pleistocene large pothole in tholeiitic basalt (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Interstate State Park, Taylors Falls, Minnesota, USA) 6
by James St. John
by James St. John
Isle Royale Queen IV business office and gift shop - Leaving Copper Harbor for Isle Royale National Park
by Joetography LLC
by Joetography LLC
End-Pleistocene large pothole in tholeiitic basalt (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Interstate State Park, Taylors Falls, Minnesota, USA) 10
by James St. John
by James St. John
End-Pleistocene large pothole in tholeiitic basalt (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Bake Oven Pothole, Interstate State Park, Taylors Falls, Minnesota, USA) 1
by James St. John
by James St. John
End-Pleistocene large pothole in tholeiitic basalt (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Interstate State Park, Taylors Falls, Minnesota, USA) 2
by James St. John
by James St. John
End-Pleistocene large pothole in tholeiitic basalt (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Interstate State Park, Taylors Falls, Minnesota, USA) 3
by James St. John
by James St. John
Tholeiitic basalts (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Interstate State Park, Taylors Falls, Minnesota, USA) 8
by James St. John
by James St. John
Lakeshore beach gravel (upper Holocene; derived from the North Shore Volcanic Series, Mesoproterozoic, 1.1 Ga; Burlington Bay, Two Harbors, Minnesota, USA) 5
by James St. John
by James St. John
Copper skull (Mesoproterozoic, 1.05-1.06 Ga; Calumet and Hecla Mine, Calumet, Michigan, USA) 4
by James St. John
by James St. John
End-Pleistocene large pothole in tholeiitic basalt (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Interstate State Park, Taylors Falls, Minnesota, USA) 9
by James St. John
by James St. John
Copper (Mesoproterozoic, 1.05-1.06 Ga; copper mine in the Upper Peninsula of Michigan, USA) 2
by James St. John
by James St. John
End-Pleistocene large pothole in tholeiitic basalt (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Interstate State Park, Taylors Falls, Minnesota, USA) 8
by James St. John
by James St. John
Side View of Isle Royal Queen IV before Leaving Copper Harbor for Isle Royale National Park
by Joetography LLC
by Joetography LLC
Basalt (Newark Supergroup, Lower Jurassic; Watchung Mountain, Orange, New Jersey, USA)
by James St. John
by James St. John
Rhyolite (Palisade Rhyolite, North Shore Volcanic Group, Mesoproterozoic, 1096-1097 Ma; Rt. 1 roadcut just north of Ilgen City, Minnesota, USA) 1
by James St. John
by James St. John
Vesicular basalt (Quaternary; Snake River Plain, Idaho, USA) 3
by James St. John
by James St. John
Copper skulls (Mesoproterozoic, 1.05-1.06 Ga; Calumet and Hecla Mine, Calumet, Michigan, USA)
by James St. John
by James St. John
Captain's Chair of Isle Royale Queen IV - Isle Royale National Park
by Joetography LLC
by Joetography LLC
Silver (Mesoproterozoic, 1.05-1.06 Ga; Kearsarge Mine, Houghton County, Upper Peninsula of Michigan, USA) 3
by James St. John
by James St. John
481件～540件 (全 1,326件)