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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) 4
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) 4
by James St. John

クリエイティブ・コモンズ 表示 2.1

サイズ変更など
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) 38
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) 38
by James St. John

クリエイティブ・コモンズ 表示 2.1

サイズ変更など
Olivine tholeiite basalt lava flow at Gooseberry Falls - Lower Falls (Gooseberry River Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Gooseberry Falls State Park, Minnesota, USA) 1
Olivine tholeiite basalt lava flow at Gooseberry Falls - Lower 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

サイズ変更など

IMG_0883
IMG_0883
by moron958

クリエイティブ・コモンズ 表示 2.1

サイズ変更など
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) 2
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) 2
by James St. John

クリエイティブ・コモンズ 表示 2.1

サイズ変更など
steep_hill_down
steep_hill_down
by rharrison

クリエイティブ・コモンズ 表示-継承 2.1

サイズ変更など

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

クリエイティブ・コモンズ 表示 2.1

サイズ変更など
Basalt lava flows (North Shore Volcanic Group, Mesoproterozoic, ~1.1 Ga; Leif Ericson Park, Duluth, Minnesota, USA) 2
Basalt lava flows (North Shore Volcanic Group, Mesoproterozoic, ~1.1 Ga; Leif Ericson Park, Duluth, Minnesota, USA) 2
by James St. John

クリエイティブ・コモンズ 表示 2.1

サイズ変更など
Copper Range # 29 steam locomotive (2-8-0) 2
Copper Range # 29 steam locomotive (2-8-0) 2
by James St. John

クリエイティブ・コモンズ 表示 2.1

サイズ変更など

Rhyolite (Palisade Rhyolite, North Shore Volcanic Group, Mesoproterozoic, 1096-1097 Ma; Rt. 1 roadcut just north of Ilgen City, Minnesota, USA) 6
Rhyolite (Palisade Rhyolite, North Shore Volcanic Group, Mesoproterozoic, 1096-1097 Ma; Rt. 1 roadcut just north of Ilgen City, Minnesota, USA) 6
by James St. John

クリエイティブ・コモンズ 表示 2.1

サイズ変更など
Rhyolite (Palisade Rhyolite, North Shore Volcanic Group, Mesoproterozoic, 1096-1097 Ma; Rt. 1 roadcut just north of Ilgen City, Minnesota, USA) 3
Rhyolite (Palisade Rhyolite, North Shore Volcanic Group, Mesoproterozoic, 1096-1097 Ma; Rt. 1 roadcut just north of Ilgen City, Minnesota, USA) 3
by James St. John

クリエイティブ・コモンズ 表示 2.1

サイズ変更など
Lakeshore beach gravel (upper Holocene; derived from the North Shore Volcanic Group, Mesoproterozoic, ~1.1 Ga; Leif Ericson Park, Duluth, Minnesota, USA) 3
Lakeshore beach gravel (upper Holocene; derived from the North Shore Volcanic Group, Mesoproterozoic, ~1.1 Ga; Leif Ericson Park, Duluth, Minnesota, USA) 3
by James St. John

クリエイティブ・コモンズ 表示 2.1

サイズ変更など

IMG_2719
IMG_2719
by moron958

クリエイティブ・コモンズ 表示 2.1

サイズ変更など
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

サイズ変更など
Amygdaloidal basalt (Portage Lake Volcanic Series, upper Mesoproterozoic, ~1.095-1.096 Ga; mine north of South Range, Upper Peninsula of Michigan, USA)
Amygdaloidal basalt (Portage Lake Volcanic Series, upper Mesoproterozoic, ~1.095-1.096 Ga; mine north of South Range, Upper Peninsula of Michigan, USA)
by James St. John

クリエイティブ・コモンズ 表示 2.1

サイズ変更など

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

クリエイティブ・コモンズ 表示 2.1

サイズ変更など
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

サイズ変更など
Rhyolite (Palisade Rhyolite, North Shore Volcanic Group, Mesoproterozoic, 1096-1097 Ma; Rt. 1 roadcut just north of Ilgen City, Minnesota, USA) 7
Rhyolite (Palisade Rhyolite, North Shore Volcanic Group, Mesoproterozoic, 1096-1097 Ma; Rt. 1 roadcut just north of Ilgen City, Minnesota, USA) 7
by James St. John

クリエイティブ・コモンズ 表示 2.1

サイズ変更など

Intergranular laumontite in 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)
Intergranular laumontite in 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)
by James St. John

クリエイティブ・コモンズ 表示 2.1

サイズ変更など
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

サイズ変更など
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

サイズ変更など

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

サイズ変更など
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

サイズ変更など
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

サイズ変更など

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

サイズ変更など
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

サイズ変更など
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

サイズ変更など

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

サイズ変更など
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

サイズ変更など
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

サイズ変更など

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

サイズ変更など
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

サイズ変更など
Quartz tholeiite basalt lava flow (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 7
Quartz tholeiite basalt lava flow (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 7
by James St. John

クリエイティブ・コモンズ 表示 2.1

サイズ変更など

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

サイズ変更など
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

サイズ変更など
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

サイズ変更など

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

サイズ変更など
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

サイズ変更など
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

サイズ変更など

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

サイズ変更など
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

サイズ変更など
Copper Harbor -1
Copper Harbor -1
by Justin Link

クリエイティブ・コモンズ 表示 2.1

サイズ変更など

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

サイズ変更など
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

サイズ変更など
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

サイズ変更など

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

サイズ変更など
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

サイズ変更など
IMG_0829
IMG_0829
by moron958

クリエイティブ・コモンズ 表示 2.1

サイズ変更など

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

サイズ変更など
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

サイズ変更など
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

サイズ変更など

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

サイズ変更など
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

サイズ変更など
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

サイズ変更など

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

サイズ変更など
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

サイズ変更など
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

サイズ変更など

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

サイズ変更など
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

サイズ変更など
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

サイズ変更など


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