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Isle Royale National Park, Michigan. Glacially rounded and striated outcrop near the portage trail at Pickerel Cove. Circa 1971. Figure 6, U.S. Geological Survey Professional paper 754-A; Figure 48, U.S. Geological Survey Bulletin 1309.
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Isle Royale National Park, Michigan. Sandstone pebble beach west of Little Boat Harbor.U.S. National Park Service boat "D.J. Tobin" provided transportation for geologic studies. Circa 1971. Figure 27, U.S. Geological Survey Bulletin 1309.
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Isle Royale National Park, Michigan. Fingerlike promontories on the northeast end of Isle Royale. Photo by A. Eliason, U.S. National Park Service, circa 1971. Figure 4, U.S. Geological Survey Bulletin 1309.
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Isle Royale National Park, Michigan. Amygdaloid Island Flow with characteristic agate amygdules (sawed surface) from the northeast end of Amygdaloid Island. Circa 1971. Figure 15, U.S. Geological Survey Professional paper 754-C; Figure 75, U.S. Geological Survey Bulletin 1309.
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Isle Royale National Park, Michigan. Breccia occurring above the Amygdaloid Island Flow on the south shore at the east end of Amygdaloid Island. Circa 1971. Figure 19, U.S. Geological Survey Professional paper 754-C.
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Isle Royale National Park, Michigan. Cliff in Copper Harbor Conglomerate on the north side of Feldtmann Ridge. Circa 1971. Figure 29, U.S. Geological Survey Bulletin 1309.
The geodatabase contains 13 relate tables that together provide updated and synchronized classifications to an existing vegetation map layer for each of the nine park units in the Great Lakes Network (GLKN) of the National Park Service (NPS) Natural Resource Inventory and Monitoring Program. The classifications include 1) vegetation types at every hierarchical level in the 2015 version of the U.S. National Vegetation Classification (USNVC) and 2) map classes that represent vegetation and land cover in the vegetation map layers. Furthermore, the tables provide a crosswalk between the two classifications (vegetation and map). Each park unit in GLKN has received, at different times over several years, vegetation data...
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Isle Royale National Park, Michigan. Ancient desiccation cracks on siltstone at Isle Royale compared to similar features on modern drying mud. Circa 1971. Figure 36-A, U.S. Geological Survey Bulletin 1309.
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Isle Royale National Park, Michigan. Across Duncan Bay from Lookout Louise. Circa 1971. Figure 5, U.S. Geological Survey Bulletin 1309.
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Isle Royale National Park, Michigan. Porphyrite from the Huginnin Flow on the beach at Huginnin Cove. The pencil is approximately 15 centimeters long. Circa 1971. Figure 12, U.S. Geological Survey Professional paper 754-C; Figure 23, U.S. Geological Survey Bulletin 1309.
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Isle Royale National Park, Michigan. Hoist and boiler remains at the island mine, abandoned in 1877. Circa 1971. Figure 2, U.S. Geological Survey Bulletin 1309.
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Isle Royale National Park, Michigan. Zone of spheroidal weathering in a basalt lava flow. This zone of partly decomposed rock escaped removal by glacial erosion because of its protected location. Circa 1971. Figure 7, U.S. Geological Survey Professional paper 754-A.
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Isle Royale National Park, Michigan. Beach cobble of porphyrite from the Grace Island Flow on Grace Island with a rather unusual distribution of plagioclase phenocrysts. The dark spots are amygdules of pumpellyite. The long dimension is 15 centimeters. Circa 1971. Figure 13, U.S. Geological Survey Professional paper 754-C; Figure 24, U.S. Geological Survey Bulletin 1309.
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Isle Royale National Park, Michigan. Characteristic textures of volcanic rocks on Isle Royale: trap from the Minong Flow on the west end of Isle Royale. Circa 1971. Figure 4-F, U.S. Geological Survey Professional paper 754-C; Figure 12-F, U.S. Geological Survey Bulletin 1309.
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Isle Royale National Park, Michigan. Coarse ophite with knobby weathered Surface from the outh side of Raspberry Island. The penknife is 7 centimeters long. Circa 1971. Figure 5, U.S. Geological Survey Professional paper 754-C; Figure 13, U.S. Geological Survey Bulletin 1309.
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Isle Royale National Park, Michigan. Prehnite amygdules in beach pebble derived from lava flow. Long dimension of the pebble is 5 centimeters. Circa 1971. Figure 73, U.S. Geological Survey Bulletin 1309.
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Isle Royale National Park, Michigan. Ancient lava flow with ropy surface. Circa 1971. Figure 16 (upper photo), U.S. Geological Survey Bulletin 1309.
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Isle Royale National Park, Michigan. Bull moose feeding in a beaver pond. Circa 1971. Figure 6, U.S. Geological Survey Bulletin 1309.
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Isle Royale National Park, Michigan. Characteristic textures of volcanic rocks on Isle Royale: typical ophite, beach pebble from Mott Island. Circa 1971. Figure 4-A, U.S. Geological Survey Professional paper 754-C; Figure 12-A, U.S. Geological Survey Bulletin 1309.
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Isle Royale National Park, Michigan. Ripple markings on sandstone, west of Attwood Beach. Photo by R.G. Wolff, circa 1971. Figure 35, U.S. Geological Survey Bulletin 1309.
map background search result map search result map Isle Royale National Park, Michigan. Glacially rounded and striated outcrop near the portage trail at Pickerel Cove. Circa 1971. Zone of spheroidal weathering in a basalt lava flow. Isle Royale National Park, Michigan. 1971. Characteristic textures of volcanic rocks on Isle Royale: typical ophite, beach pebble from Mott Island. Isle Royale National Park, Keweenaw County, Michigan. 1971. Characteristic textures of volcanic rocks on Isle Royale. Isle Royale National Park, Keweenaw County, Michigan. 1971. Isle Royale National Park, Michigan. Coarse ophite with knobby weathered Surface from the outh side of Raspberry Island. Circa 1971. Isle Royale National Park, Michigan. Porphyrite from the Huginnin Flow on the beach at Huginnin Cove. Circa 1971. Isle Royale National Park, Michigan. Beach cobble of porphyrite from the Grace Island Flow on Grace Island with a rather unusual distribution of plagioclase phenocrysts. 1971. Isle Royale National Park, Michigan. Amygdaloid Island Flow with characteristic agate amygdules (sawed surface) from the northeast end of Amygdaloid Island. Circa 1971. Isle Royale National Park, Michigan. Breccia occurring above the Amygdaloid Island Flow on the south shore at the east end of Amygdaloid Island. Circa 1971. Hoist and boiler remains at the island mine. Isle Royale National Park, Houghton County, Michigan. 1971. Isle Royale National Park, Michigan. Fingerlike promontories on the northeast end of Isle Royale. Circa 1971. Isle Royale National Park, Michigan. Across Duncan Bay from Lookout Louise. Circa 1971. Isle Royale National Park, Michigan. Bull moose feeding in a beaver pond. Circa 1971. Isle Royale National Park, Michigan. Ancient lava flow with ropy surface. Circa 1971. Isle Royale National Park, Michigan. Sandstone pebble beach west of Little Boat Harbor. Circa 1971. Isle Royale National Park, Michigan. Cliff in Copper Harbor Conglomerate on the north side of Feldtmann Ridge. Circa 1971. Isle Royale National Park, Michigan. Ripple markings on sandstone, west of Attwood Beach. Isle Royale National Park, Michigan. Ancient desiccation cracks on siltstone at Isle Royale compared to similar features on modern drying mud. Circa 1971. Isle Royale National Park, Michigan. Prehnite amygdules in beach pebble derived from lava flow. Circa 1971. Isle Royale National Park, Michigan. Glacially rounded and striated outcrop near the portage trail at Pickerel Cove. Circa 1971. Zone of spheroidal weathering in a basalt lava flow. Isle Royale National Park, Michigan. 1971. Characteristic textures of volcanic rocks on Isle Royale: typical ophite, beach pebble from Mott Island. Isle Royale National Park, Keweenaw County, Michigan. 1971. Characteristic textures of volcanic rocks on Isle Royale. Isle Royale National Park, Keweenaw County, Michigan. 1971. Isle Royale National Park, Michigan. Coarse ophite with knobby weathered Surface from the outh side of Raspberry Island. Circa 1971. Isle Royale National Park, Michigan. Porphyrite from the Huginnin Flow on the beach at Huginnin Cove. Circa 1971. Isle Royale National Park, Michigan. Beach cobble of porphyrite from the Grace Island Flow on Grace Island with a rather unusual distribution of plagioclase phenocrysts. 1971. Isle Royale National Park, Michigan. Amygdaloid Island Flow with characteristic agate amygdules (sawed surface) from the northeast end of Amygdaloid Island. Circa 1971. Isle Royale National Park, Michigan. Breccia occurring above the Amygdaloid Island Flow on the south shore at the east end of Amygdaloid Island. Circa 1971. Hoist and boiler remains at the island mine. Isle Royale National Park, Houghton County, Michigan. 1971. Isle Royale National Park, Michigan. Fingerlike promontories on the northeast end of Isle Royale. Circa 1971. Isle Royale National Park, Michigan. Across Duncan Bay from Lookout Louise. Circa 1971. Isle Royale National Park, Michigan. Bull moose feeding in a beaver pond. Circa 1971. Isle Royale National Park, Michigan. Ancient lava flow with ropy surface. Circa 1971. Isle Royale National Park, Michigan. Sandstone pebble beach west of Little Boat Harbor. Circa 1971. Isle Royale National Park, Michigan. Cliff in Copper Harbor Conglomerate on the north side of Feldtmann Ridge. Circa 1971. Isle Royale National Park, Michigan. Ripple markings on sandstone, west of Attwood Beach. Isle Royale National Park, Michigan. Ancient desiccation cracks on siltstone at Isle Royale compared to similar features on modern drying mud. Circa 1971. Isle Royale National Park, Michigan. Prehnite amygdules in beach pebble derived from lava flow. Circa 1971.