supergroup
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Fossil redwood tree trunk (probably Metasequoia) (Sepulcher Formation, Eocene; "Petrified Tree", Yellowstone National Park, Wyoming, USA) 2
by James St. John
by James St. John
サイズ変更など
End-Pleistocene large pothole in tholeiitic basalt (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Lily Pond Pothole, Interstate State Park, Taylors Falls, Minnesota, USA) 1
by James St. John
by James St. John
Fossil redwood tree trunk (probably Metasequoia) (Sepulcher Formation, Eocene; "Petrified Tree", Yellowstone National Park, Wyoming, USA) 3
by James St. John
by James St. John
End-Pleistocene large pothole in tholeiitic basalt (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Bottomless Pit 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; Lily Pond Pothole, Interstate State Park, Taylors Falls, Minnesota, USA) 2
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) 1
by James St. John
by James St. John
Phyllites (Anakeesta Formation, Neoproterozoic; Newfound Gap Road roadcut, Great Smoky Mountains, Tennessee, USA) 14
by James St. John
by James St. John
Fossil redwood tree trunk (probably Metasequoia) (Sepulcher Formation, Eocene; "Petrified Tree", Yellowstone National Park, Wyoming, USA) 20
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) 5
by James St. John
by James St. John
Glacially-grooved basalt (Scales Creek Flow, Portage Lake Volcanic Series, upper Mesoproterozoic, ~1.095-1.096 Ga; Surveyor's Arch outcrop, Houghton, Upper Peninsula of Michigan, USA)
by James St. John
by James St. John
Crystalline placer gold (derived from a conglomeratic paleoplacer in Uairen Formation, Paleoproterozoic, about 1.7-1.8 Ga; Santa Elena Placer Gold District, southeastern Bolivar State, southeastern Venezuela) 1
by James St. John
by James St. John
Shatterconed sandstone (Mississagi Formation, Paleoproterozoic, ~2.3-2.4 Ga; Ramsey Lake Road outcrop, Sudbury, Ontario, Canada) 182
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) 8
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) 3
by James St. John
by James St. John
Jasper pebbles in quartzite (Lorrain Formation, Paleoproterozoic, ~2.3 Ga; Ottertail Lake Northeast roadcut, near Bruce Mines, Ontario, Canada) 28
by James St. John
by James St. John
Fossil redwood tree trunk (probably Metasequoia) (Sepulcher Formation, Eocene; "Petrified Tree", Yellowstone National Park, Wyoming, USA) 19
by James St. John
by James St. John
Cupriferous amygdaloidal basalt (Knowlton Flow, Portage Lake Volcanic Series, upper Mesoproterozoic, ~1.096 Ga; Caledonia Mine, Upper Peninsula of Michigan, USA)
by James St. John
by James St. John
End-Pleistocene large potholes in tholeiitic basalt (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Interstate State Park, Taylors Falls, Minnesota, USA) 1
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) 2
by James St. John
by James St. John
Cow Branch Formation (Upper Triassic; Pit B of Solite Quarry, near Eden, North Carolina, USA) 22
by James St. John
by James St. John
Irish Green Marble (Connemara Marble Formation, Neoproterozoic; Ordovician metamorphism; Galway, Ireland) 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) 7
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) 4
by James St. John
by James St. John
Fossil redwood tree trunk (probably Metasequoia) (Sepulcher Formation, Eocene; "Petrified Tree", Yellowstone National Park, Wyoming, USA) 14
by James St. John
by James St. John
Stromatolitic metadolostone (Kona Dolomite, Paleoproterozoic, 2.20-2.29 Ga; Marquette area, Upper Peninsula of Michigan, USA) 2
by James St. John
by James St. John
Ophitic basalt (Scales Creek Flow, Portage Lake Volcanic Series, upper Mesoproterozoic, ~1.095-1.096 Ga; Seventh Street roadcut, Houghton, Upper Peninsula of Michigan, USA)
by James St. John
by James St. John
New Haven Arkose (Upper Triassic; Durham, Connecticut, USA) 3
by James St. John
by James St. John
Jasper-quartz pebble conglomerate (Lorrain Formation, Paleoproterozoic, ~2.3 Ga; Ottertail Lake Northeast roadcut, near Bruce Mines, Ontario, Canada) 58
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) 6
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) 3
by James St. John
by James St. John
Baptism River Basalt (North Shore Volcanic Group, Mesoproterozoic, ~1097 Ma; Split Rock Lighthouse, Minnesota, USA) 1
by James St. John
by James St. John
Quartz vein in sandstone (Thunderhead Sandstone, Neoproterozoic; Clingmans Dome, Great Smoky Mountains, North Carolina, USA) 11
by James St. John
by James St. John
Grypania spiralis (Negaunee Iron-Formation, 2.11 Ga or 1.874 Ga; Empire Mine, SE of town of Ishpeming, Marquette County, Upper Peninsula of Michigan, USA) 12
by James St. John
by James St. John
Fossil redwood tree trunk (probably Metasequoia) (Sepulcher Formation, Eocene; "Petrified Tree", Yellowstone National Park, Wyoming, USA) 13
by James St. John
by James St. John
Reddish sandstone (Upper Triassic; Jordan Lake, North Carolina, USA) 19
by James St. John
by James St. John
Marinace Green Granite (polymict metaconglomerate) (Ouricuri do Ouro Formation, Mesoproterozoic, ~1.6-1.7 Ga; Bahia, Brazil) 1
by James St. John
by James St. John
Sugilite-braunite (Hotazel Formation, Paleoproterozoic, 2.2-2.3 Ga; Wessels Mine, Kalahari Manganese Field, Northern Cape Province, South Africa) 1
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
Potholes (Presque Isle River, Porcupine Mountains State Park, Upper Peninsula of Michigan, USA)
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) 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
Aggregate plant (Solite Quarry, Virginia-North Carolina border, USA) 1
by James St. John
by James St. John
Reddish sandstone (Upper Triassic; Jordan Lake, North Carolina, USA) 8
by James St. John
by James St. John
Tasmanite oil shale (kerogenite) (Quamby Mudstone, Lower Permian; at or near Quamby Brook, northern Tasmania) 2
by James St. John
by James St. John
Glacially-smoothed & striated tillite outcrop (Coleman Member, Gowganda Formation, Paleoproterozoic, ~2.3 Ga; Straight Lake West roadcut, north of Temagami, Ontario, Canada) 21
by James St. John
by James St. John
Fossil redwood tree trunk (probably Metasequoia) (Sepulcher Formation, Eocene; "Petrified Tree", Yellowstone National Park, Wyoming, USA) 32
by James St. John
by James St. John
Metatillite (diamictite) (Gowganda Formation, Paleoproterozoic, ~2.3 Ga; Route 6 outcrop, north of Manitoulin Island, Ontario, Canada) 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) 11
by James St. John
by James St. John
Faulted clast in tillite (Coleman Member, Gowganda Formation, Paleoproterozoic, ~2.3 Ga; Straight Lake West roadcut, north of Temagami, Ontario, Canada) 5
by James St. John
by James St. John
Amygdaloidal basalt (upper Portage Lake Volcanic Series, upper Mesoproterozoic, ~1.094 Ga; Delaware Copper 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) 14
by James St. John
by James St. John
Fossil redwood tree trunk (probably Metasequoia) (Sepulcher Formation, Eocene; "Petrified Tree", Yellowstone National Park, Wyoming, USA) 31
by James St. John
by James St. John
Shatterconed sandstone (Mississagi Formation, Paleoproterozoic, ~2.3-2.4 Ga; Ramsey Lake Road outcrop, Sudbury, Ontario, Canada) 78
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
361件～420件 (全 2,171件)