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Intergranular calcite in autobrecciated amygdaloidal tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 4
Intergranular calcite in autobrecciated amygdaloidal tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 4
by James St. John

クリエイティブ・コモンズ 表示 2.1

Tholeiitic basalts (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Interstate State Park, St. Croix Falls, Wisconsin, USA) 2
Tholeiitic basalts (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Interstate State Park, St. Croix Falls, Wisconsin, USA) 2
by James St. John

クリエイティブ・コモンズ 表示 2.1

Basalt lava flows (North Shore Volcanic Group, Mesoproterozoic, ~1.1 Ga; Leif Ericson Park, Duluth, Minnesota, USA) 6
Basalt lava flows (North Shore Volcanic Group, Mesoproterozoic, ~1.1 Ga; Leif Ericson Park, Duluth, Minnesota, USA) 6
by James St. John

クリエイティブ・コモンズ 表示 2.1


Columnar-jointed olivine tholeiite basalt lava flow below Gooseberry Falls - Main Falls (Middle Falls) (Gooseberry River Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Gooseberry Falls State Park, Minnesota, USA) 1
Columnar-jointed olivine tholeiite basalt lava flow below Gooseberry Falls - Main Falls (Middle Falls) (Gooseberry River Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Gooseberry Falls State Park, Minnesota, USA) 1
by James St. John

クリエイティブ・コモンズ 表示 2.1

Rhyolite (Palisade Rhyolite, North Shore Volcanic Group, Mesoproterozoic, 1096-1097 Ma; Rt. 1 roadcut just north of Ilgen City, Minnesota, USA) 13
Rhyolite (Palisade Rhyolite, North Shore Volcanic Group, Mesoproterozoic, 1096-1097 Ma; Rt. 1 roadcut just north of Ilgen City, Minnesota, USA) 13
by James St. John

クリエイティブ・コモンズ 表示 2.1

Basalt lava flows (North Shore Volcanic Group, Mesoproterozoic, ~1.1 Ga; Lake Superior shoreline exposure along the North Shore Scenic Railroad line, just northeast of Duluth, Minnesota, USA) 3
Basalt lava flows (North Shore Volcanic Group, Mesoproterozoic, ~1.1 Ga; Lake Superior shoreline exposure along the North Shore Scenic Railroad line, just northeast of Duluth, Minnesota, USA) 3
by James St. John

クリエイティブ・コモンズ 表示 2.1


Quartz tholeiite basalt lava flows (flow B over flow A, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 5
Quartz tholeiite basalt lava flows (flow B over flow A, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 5
by James St. John

クリエイティブ・コモンズ 表示 2.1

Autobrecciated amygdaloidal quartz tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 9
Autobrecciated amygdaloidal quartz tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 9
by James St. John

クリエイティブ・コモンズ 表示 2.1

Tholeiitic basalts (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Interstate State Park, St. Croix Falls, Wisconsin, USA) 7
Tholeiitic basalts (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Interstate State Park, St. Croix Falls, Wisconsin, USA) 7
by James St. John

クリエイティブ・コモンズ 表示 2.1


Basalt lava flow (North Shore Volcanic Group, Mesoproterozoic, ~1.1 Ga; Leif Ericson Park, Duluth, Minnesota, USA) 4
Basalt lava flow (North Shore Volcanic Group, Mesoproterozoic, ~1.1 Ga; Leif Ericson Park, Duluth, Minnesota, USA) 4
by James St. John

クリエイティブ・コモンズ 表示 2.1

Autobrecciated amygdaloidal quartz tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 33
Autobrecciated amygdaloidal quartz tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 33
by James St. John

クリエイティブ・コモンズ 表示 2.1

Copper Range # 29 steam locomotive (2-8-0) 1
Copper Range # 29 steam locomotive (2-8-0) 1
by James St. John

クリエイティブ・コモンズ 表示 2.1


Quartz tholeiite basalt lava flows (flow B over flow A, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 2
Quartz tholeiite basalt lava flows (flow B over flow A, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 2
by James St. John

クリエイティブ・コモンズ 表示 2.1

Quincy #4 Boiler Ruins Up Close
Quincy #4 Boiler Ruins Up Close
by TheeErin

クリエイティブ・コモンズ 表示-改変禁止 2.1

Tholeiitic basalts (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Interstate State Park, Taylors Falls, Minnesota, USA) 3
Tholeiitic basalts (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Interstate State Park, Taylors Falls, Minnesota, USA) 3
by James St. John

クリエイティブ・コモンズ 表示 2.1


Tholeiitic basalts (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Interstate State Park, Taylors Falls, Minnesota, USA) 5
Tholeiitic basalts (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Interstate State Park, Taylors Falls, Minnesota, USA) 5
by James St. John

クリエイティブ・コモンズ 表示 2.1

Lakeshore beach gravel (upper Holocene; derived from the North Shore Volcanic Series, Mesoproterozoic, 1.1 Ga; Burlington Bay, Two Harbors, Minnesota, USA) 4
Lakeshore beach gravel (upper Holocene; derived from the North Shore Volcanic Series, Mesoproterozoic, 1.1 Ga; Burlington Bay, Two Harbors, Minnesota, USA) 4
by James St. John

クリエイティブ・コモンズ 表示 2.1

Intergranular calcite in autobrecciated amygdaloidal tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 6
Intergranular calcite in autobrecciated amygdaloidal tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 6
by James St. John

クリエイティブ・コモンズ 表示 2.1


Autobrecciated amygdaloidal quartz tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 20
Autobrecciated amygdaloidal quartz tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 20
by James St. John

クリエイティブ・コモンズ 表示 2.1

Basalt lava flows (North Shore Volcanic Group, Mesoproterozoic, ~1.1 Ga; Lake Superior shoreline exposure along the North Shore Scenic Railroad line, just northeast of Duluth, Minnesota, USA) 2
Basalt lava flows (North Shore Volcanic Group, Mesoproterozoic, ~1.1 Ga; Lake Superior shoreline exposure along the North Shore Scenic Railroad line, just northeast of Duluth, Minnesota, USA) 2
by James St. John

クリエイティブ・コモンズ 表示 2.1

Eagle Harbor Lighthouse - Keweenaw Peninsula - Michigan in Winter
Eagle Harbor Lighthouse - Keweenaw Peninsula - Michigan in Winter
by Tony Webster

クリエイティブ・コモンズ 表示 2.1


Olivine basalt (Cedar Canyon, Iron County, Utah, USA) 3
Olivine basalt (Cedar Canyon, Iron County, Utah, USA) 3
by James St. John

クリエイティブ・コモンズ 表示 2.1

Autobrecciated amygdaloidal quartz tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 10
Autobrecciated amygdaloidal quartz tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 10
by James St. John

クリエイティブ・コモンズ 表示 2.1

Copper Harbor -1
Copper Harbor -1
by Justin Link

クリエイティブ・コモンズ 表示 2.1


"Chief Wawatam" car ferry, crossing the Straits of Mackinaw in 1913, with Michigan National Guard troops and their troop train, en route to the Keweenaw copper district to quell the miners' strike.
"Chief Wawatam" car ferry, crossing the Straits of Mackinaw in 1913, with Michigan National Guard troops and their troop train, en route to the Keweenaw copper district to quell the miners' strike.
by In Memoriam: Wystan

クリエイティブ・コモンズ 表示-継承 2.1

Autobrecciated amygdaloidal quartz tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 12
Autobrecciated amygdaloidal quartz tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 12
by James St. John

クリエイティブ・コモンズ 表示 2.1

Autobrecciated amygdaloidal quartz tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 18
Autobrecciated amygdaloidal quartz tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 18
by James St. John

クリエイティブ・コモンズ 表示 2.1


native copper
native copper
by géry60

クリエイティブ・コモンズ 表示-改変禁止 2.1

Autobrecciated amygdaloidal quartz tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 14
Autobrecciated amygdaloidal quartz tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 14
by James St. John

クリエイティブ・コモンズ 表示 2.1

Basalt lava flow (North Shore Volcanic Group, Mesoproterozoic, ~1.1 Ga; Lake Superior shoreline exposure along the North Shore Scenic Railroad line, just northeast of Duluth, Minnesota, USA) 4
Basalt lava flow (North Shore Volcanic Group, Mesoproterozoic, ~1.1 Ga; Lake Superior shoreline exposure along the North Shore Scenic Railroad line, just northeast of Duluth, Minnesota, USA) 4
by James St. John

クリエイティブ・コモンズ 表示 2.1


Native copper (Mesoproterozoic, 1.05-1.06 Ga; Keweenaw Peninsula area, Upper Peninsula of Michigan, USA) 18
Native copper (Mesoproterozoic, 1.05-1.06 Ga; Keweenaw Peninsula area, Upper Peninsula of Michigan, USA) 18
by James St. John

クリエイティブ・コモンズ 表示 2.1

IMG_0829
IMG_0829
by moron958

クリエイティブ・コモンズ 表示 2.1

Intergranular calcite in autobrecciated amygdaloidal tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 2
Intergranular calcite in autobrecciated amygdaloidal tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 2
by James St. John

クリエイティブ・コモンズ 表示 2.1


Basalt (Newark Supergroup, Lower Jurassic; Somerset County, New Jersey, USA) 15
Basalt (Newark Supergroup, Lower Jurassic; Somerset County, New Jersey, USA) 15
by James St. John

クリエイティブ・コモンズ 表示 2.1

Intergranular calcite in autobrecciated amygdaloidal tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 3
Intergranular calcite in autobrecciated amygdaloidal tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 3
by James St. John

クリエイティブ・コモンズ 表示 2.1

Large quartz-laumontite amygdule in quartz tholeiite basalt lava flow (Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 8
Large quartz-laumontite amygdule in quartz tholeiite basalt lava flow (Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 8
by James St. John

クリエイティブ・コモンズ 表示 2.1


steep_hill_up
steep_hill_up
by rharrison

クリエイティブ・コモンズ 表示-継承 2.1

IMG_2349 -help from Steven K.
IMG_2349 -help from Steven K.
by moron958

クリエイティブ・コモンズ 表示 2.1

Autobrecciated amygdaloidal quartz tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 34
Autobrecciated amygdaloidal quartz tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 34
by James St. John

クリエイティブ・コモンズ 表示 2.1


Autobrecciated amygdaloidal quartz tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 39
Autobrecciated amygdaloidal quartz tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 39
by James St. John

クリエイティブ・コモンズ 表示 2.1

Rhyolite (Palisade Rhyolite, North Shore Volcanic Group, Mesoproterozoic, 1096-1097 Ma; Rt. 1 roadcut just north of Ilgen City, Minnesota, USA) 12
Rhyolite (Palisade Rhyolite, North Shore Volcanic Group, Mesoproterozoic, 1096-1097 Ma; Rt. 1 roadcut just north of Ilgen City, Minnesota, USA) 12
by James St. John

クリエイティブ・コモンズ 表示 2.1

Tholeiitic basalts (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Interstate State Park, Taylors Falls, Minnesota, USA) 1
Tholeiitic basalts (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Interstate State Park, Taylors Falls, Minnesota, USA) 1
by James St. John

クリエイティブ・コモンズ 表示 2.1


Michigan National Guard Officers at Quincy Mine Shaft No. 2, 1913 Keweenaw Miners Strike.
Michigan National Guard Officers at Quincy Mine Shaft No. 2, 1913 Keweenaw Miners Strike.
by In Memoriam: Wystan

クリエイティブ・コモンズ 表示-継承 2.1

Autobrecciated amygdaloidal quartz tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 29
Autobrecciated amygdaloidal quartz tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 29
by James St. John

クリエイティブ・コモンズ 表示 2.1

Amygdaloidal basalt (upper Portage Lake Volcanic Series, upper Mesoproterozoic, ~1.094 Ga; Delaware Copper Mine, Upper Peninsula of Michigan, USA) 3
Amygdaloidal basalt (upper Portage Lake Volcanic Series, upper Mesoproterozoic, ~1.094 Ga; Delaware Copper Mine, Upper Peninsula of Michigan, USA) 3
by James St. John

クリエイティブ・コモンズ 表示 2.1


Tholeiitic basalts (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Interstate State Park, St. Croix Falls, Wisconsin, USA) 4
Tholeiitic basalts (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Interstate State Park, St. Croix Falls, Wisconsin, USA) 4
by James St. John

クリエイティブ・コモンズ 表示 2.1

Autobrecciated amygdaloidal quartz tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 35
Autobrecciated amygdaloidal quartz tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 35
by James St. John

クリエイティブ・コモンズ 表示 2.1

2010-kcup-day2-7448
2010-kcup-day2-7448
by xmatic

クリエイティブ・コモンズ 表示 2.1


Autobrecciated amygdaloidal quartz tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 27
Autobrecciated amygdaloidal quartz tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 27
by James St. John

クリエイティブ・コモンズ 表示 2.1

Oh You Kid!
Oh You Kid!
by TheeErin

クリエイティブ・コモンズ 表示-改変禁止 2.1

Vesicular basalt 1
Vesicular basalt 1
by James St. John

クリエイティブ・コモンズ 表示 2.1


Autobrecciated amygdaloidal quartz tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 13
Autobrecciated amygdaloidal quartz tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 13
by James St. John

クリエイティブ・コモンズ 表示 2.1

Flying Over the Keweenaw Peninsula - Michigan
Flying Over the Keweenaw Peninsula - Michigan
by Tony Webster

クリエイティブ・コモンズ 表示 2.1

Autobrecciated amygdaloidal quartz tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 31
Autobrecciated amygdaloidal quartz tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 31
by James St. John

クリエイティブ・コモンズ 表示 2.1


Quartz tholeiite basalt lava flows (flow B over flow A, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 6
Quartz tholeiite basalt lava flows (flow B over flow A, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 6
by James St. John

クリエイティブ・コモンズ 表示 2.1

Tholeiitic basalts (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Interstate State Park, Taylors Falls, Minnesota, USA) 11
Tholeiitic basalts (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Interstate State Park, Taylors Falls, Minnesota, USA) 11
by James St. John

クリエイティブ・コモンズ 表示 2.1

Basalt lava flows (North Shore Volcanic Group, Mesoproterozoic, ~1.1 Ga; Lake Superior shoreline exposure along the North Shore Scenic Railroad line, just northeast of Duluth, Minnesota, USA) 1
Basalt lava flows (North Shore Volcanic Group, Mesoproterozoic, ~1.1 Ga; Lake Superior shoreline exposure along the North Shore Scenic Railroad line, just northeast of Duluth, Minnesota, USA) 1
by James St. John

クリエイティブ・コモンズ 表示 2.1


Basalt lava flows (North Shore Volcanic Group, Mesoproterozoic, ~1.1 Ga; Leif Ericson Park, Duluth, Minnesota, USA) 7
Basalt lava flows (North Shore Volcanic Group, Mesoproterozoic, ~1.1 Ga; Leif Ericson Park, Duluth, Minnesota, USA) 7
by James St. John

クリエイティブ・コモンズ 表示 2.1

Tholeiitic basalts (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Interstate State Park, Taylors Falls, Minnesota, USA) 2
Tholeiitic basalts (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Interstate State Park, Taylors Falls, Minnesota, USA) 2
by James St. John

クリエイティブ・コモンズ 表示 2.1

Tholeiitic basalts (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Interstate State Park, St. Croix Falls, Wisconsin, USA) 3
Tholeiitic basalts (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Interstate State Park, St. Croix Falls, Wisconsin, USA) 3
by James St. John

クリエイティブ・コモンズ 表示 2.1



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