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Isle Royale National Park, Michigan. Specimen from the Washington Island Flow. Ophitic texture is obscure, but characteristic dark chlorite splotches are visible. Circa 1971. Figure 16, U.S. Geological Survey Professional paper 754-C; Figure 25, U.S. Geological Survey Bulletin 1309.
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Isle Royale National Park, Michigan. Monument Rock, a stack associated with the shoreline of postglacial Lake Minong. Photo by T. Haas, U.S. National Park Service, circa 1971. Figure 17, U.S. Geological Survey Professional paper 754-A; Figure 67, U.S. Geological Survey Bulletin 1309.
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Comma-separated values (.csv) file containing data related to mercury concentrations in dragonfly samples from U.S. National Parks collected as part of the Dragonfly Mercury Project (DMP). First posted - September 14, 2018 Revised - October 18, 2019, ver. 2.0 Revised - February 4, 2020, ver. 3.0 Revised - October 28, 2020, ver. 4.0
Categories: Data, Data Release - Revised; Tags: Acadia National Park, Allegheny Portage Railroad National Historic Site, Apostle Islands National Lakeshore, Appomattox Court House National Historical Park, Battle Creek Cypress Swamp, All tags...
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Isle Royale National Park, Michigan. Slabby sandstone outcrop on Stone House Island. Circa 1971. Figure 28, U.S. Geological Survey Bulletin 1309.
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Isle Royale National Park, Michigan. Chlorastrolite amygdules showing characteristic segmented pattern. Circa 1971. Figure 72, U.S. Geological Survey Bulletin 1309.
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Isle Royale National Park, Michigan. Tuff-breccia overlying the Greenstone Flow. Fragmental character is clearly evident in this outcrop, which is close to the base of the pyroclastic unit on the north shore of Tobin Harbor near Newman Island. The knife is 7 centimeters long. Circa 1971. Figure 20, U.S. Geological Survey Professional paper 754-C; Figure 20, U.S. Geological Survey Bulletin 1309.
This data set represents initial forest communities developed for Isle Royale National Park. LANDIS-II requires an input data layer that contains the ages of each species cohort present within each cell of the landscape. To develop this layer, we matched the composition of forest inventory plots to a map of forest types, and randomly imputed U.S. Department of Agriculture Forest Inventory plots within each matching forest type.
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Isle Royale National Park, Michigan. Specimen of Prehnite amygdules. Note the radiating fibrous structure with development of "eyes." Circa 1971. Figure 74, U.S. Geological Survey Bulletin 1309.
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Comma-separated values (.csv) files containing data related to a National-scale assessment of mercury bioaccumulation in the US National Parks using dragonfly larvae as biosentinels through a citizen science framework.
Categories: Data; Tags: Acadia National Park, Allegheny Portage Railroad National Historic Site, Apostle Islands National Lakeshore, Appomattox Court House National Historical Park, Aquatic Biology, All tags...
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Isle Royale National Park, Michigan. Amygdaloid with calcite amygdules and calcite vein at top. Circa 1971. Figure 14, U.S. Geological Survey Bulletin 1309.
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Isle Royale National Park, Michigan. Copper Harbor Conglomerate sloping gently southeast into Lake Superior near Attwood Beach. Circa 1971. Figure 26, U.S. Geological Survey Bulletin 1309.
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The National Park Service (NPS), in conjunction with the Biological Resources Division (BRD) of the U.S. Geological Survey (USGS), has implemented a program to "develop a uniform hierarchical vegetation methodology" at a national level. The program will also create a geographic information system (GIS) database for the parks under its management. The purpose of the data is to document the state of vegetation within the NPS service area during the 1990's, thereby providing a baseline study for further analysis at the Regional or Service-wide level. The vegetation units of this map were determined through stereoscopic interpretation of aerial photographs supported by field sampling and ecological analysis. The vegetation...
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Isle Royale National Park, Michigan. Agate typical of those occurring in the Tuff-breccia overlying the Greenstone Flow. The knife is 7 centimeters long. Circa 1971. Figure 21, U.S. Geological Survey Professional paper 754-C; Figure 76, U.S. Geological Survey Bulletin 1309.
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Isle Royale National Park, Michigan. Characteristic textures of volcanic rocks On Isle Royale: pegmatite from the differentiated zone of the Greenstone Flow on the east end of Passage Island. This rock has a texture in which all of the minerals, especially the plagioclase, are larger when compared with those in most of the other rock types; the elongate plagioclase laths give the rock a matted appearance. Circa 1971. Figure 4-E, U.S. Geological Survey Professional paper 754-C; Figure 12-E, U.S. Geological Survey Bulletin 1309.
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Isle Royale National Park, Michigan. Rocky shoreline on Isle Royale. Circa 1971. Figure 3, U.S. Geological Survey Bulletin 1309.
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Isle Royale National Park, Michigan. Columnar jointing in the Edwards Island Flow on the north side of Edwards Island. Circa 1971. Figure 14, U.S. Geological Survey Professional paper 754-C; Figure 18, U.S. Geological Survey Bulletin 1309.
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Isle Royale National Park, Michigan. Glacial striations near Moskey Basin Campground. Circa 1971. Figure 5, U.S. Geological Survey Professional paper 754-A; Figure 47, U.S. Geological Survey Bulletin 1309.
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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.
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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. 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.


map background search result map search result map Isle Royale National Park, Michigan. Glacial striations near Moskey Basin Campground. Circa 1971. Isle Royale National Park, Michigan. Glacially rounded and striated outcrop near the portage trail at Pickerel Cove. Circa 1971. Isle Royale National Park, Michigan. Monument Rock, a stack associated with the shoreline of postglacial Lake Minong. Circa 1971. Isle Royale National Park, Michigan. Characteristic textures of volcanic rocks On Isle Royale: pegmatite from the differentiated zone of the Greenstone Flow on the east end of Passage Island. 1971. Isle Royale National Park, Michigan. Columnar jointing in the Edwards Island Flow on the north side of Edwards Island. 1971. Isle Royale National Park, Michigan. Specimen from the Washington Island Flow. Ophitic texture is obscure, but characteristic dark chlorite splotches are visible. 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. Isle Royale National Park, Michigan. Tuff-breccia overlying the Greenstone Flow. Fragmental character is clearly evident in this outcrop, which is close to the base of the pyroclastic unit on the north shore of Tobin Harbor near Newman Island . Circa 1971. Isle Royale National Park, Michigan. Agate typical of those occurring in the Tuff-breccia overlying the Greenstone Flow. 1971. Isle Royale National Park, Michigan. Rocky shoreline on Isle Royale. Circa 1971. Isle Royale National Park, Michigan. Amygdaloid with calcite amygdules and calcite vein at top. Circa 1971. Isle Royale National Park, Michigan. Copper Harbor Conglomerate sloping gently southeast into Lake Superior near Attwood Beach. Circa 1971. Isle Royale National Park, Michigan. Slabby sandstone outcrop on Stone House Island. 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. Chlorastrolite amygdules showing characteristic segmented pattern.  Circa 1971. Isle Royale National Park, Michigan. Specimen of Prehnite amygdules. Note the radiating fibrous structure with development of "eyes." Circa 1971. Isle Royale National Park Vegetation Mapping Project - Spatial Vegetation Data Total Mercury Concentrations in Dragonfly Larvae from U.S. National Parks Mercury Bioaccumulation in US National Parks Using Dragonfly Larvae as Biosentinels, 2009-2018 Isle Royal National Park: Initial Forest Communities of Isle Royale National Park Isle Royale National Park, Michigan. Glacial striations near Moskey Basin Campground. Circa 1971. Isle Royale National Park, Michigan. Glacially rounded and striated outcrop near the portage trail at Pickerel Cove. Circa 1971. Isle Royale National Park, Michigan. Monument Rock, a stack associated with the shoreline of postglacial Lake Minong. Circa 1971. Isle Royale National Park, Michigan. Characteristic textures of volcanic rocks On Isle Royale: pegmatite from the differentiated zone of the Greenstone Flow on the east end of Passage Island. 1971. Isle Royale National Park, Michigan. Columnar jointing in the Edwards Island Flow on the north side of Edwards Island. 1971. Isle Royale National Park, Michigan. Specimen from the Washington Island Flow. Ophitic texture is obscure, but characteristic dark chlorite splotches are visible. 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. Isle Royale National Park, Michigan. Tuff-breccia overlying the Greenstone Flow. Fragmental character is clearly evident in this outcrop, which is close to the base of the pyroclastic unit on the north shore of Tobin Harbor near Newman Island . Circa 1971. Isle Royale National Park, Michigan. Agate typical of those occurring in the Tuff-breccia overlying the Greenstone Flow. 1971. Isle Royale National Park, Michigan. Rocky shoreline on Isle Royale. Circa 1971. Isle Royale National Park, Michigan. Amygdaloid with calcite amygdules and calcite vein at top. Circa 1971. Isle Royale National Park, Michigan. Copper Harbor Conglomerate sloping gently southeast into Lake Superior near Attwood Beach. Circa 1971. Isle Royale National Park, Michigan. Slabby sandstone outcrop on Stone House Island. 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. Chlorastrolite amygdules showing characteristic segmented pattern.  Circa 1971. Isle Royale National Park, Michigan. Specimen of Prehnite amygdules. Note the radiating fibrous structure with development of "eyes." Circa 1971. Isle Royale National Park Vegetation Mapping Project - Spatial Vegetation Data Isle Royal National Park: Initial Forest Communities of Isle Royale National Park Mercury Bioaccumulation in US National Parks Using Dragonfly Larvae as Biosentinels, 2009-2018 Total Mercury Concentrations in Dragonfly Larvae from U.S. National Parks