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Holocene sediments at Emerald Lake in central Utah (3090 m a.s.l), document the paleohydroclimatic history of the western Upper Colorado River headwater region. Multi-proxy analyses of sediment composition, mineralogy, and stable isotopes of carbonate (d18O and d13C) show changes in effective moisture for the past ca. 10,000 years at millennial to decadal timescales. Emerald Lake originated as a shallow closed-basin cirque pond during the early Holocene. By ca. 7000 cal yr BP, higher lake levels and carbonate d18O values indicate rising effective moisture and higher proportions of summer precipitation continued at least until ca. 5500 cal yr BP when a landslide entered the lake margin. Between ca. 4500 and 2400...
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This is a shapefile and the final unioned polygon coverage used to calculate coal resources of the lower Blackhawk Formation in the southern Wasatch coal assessment area. Polygons that make up the final unioned polygons include counties, 7.5' quadrangles, townships, surface and coal ownership, reliability, overburden categories, and net coal thickness categories. The final unioned coverage was clipped by the resource boundary polygon, which is described in the metadata file for the shapefile WS_BND.
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This is a point coverage containing 12 years (1984 through 1995) of coal mining history in the Colorado Plateau coal assessment study area. This layer was derived from the Mine Safety and Health Administration's (MSHA) Information Resource Center data for the years 1984 through 1995.
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This is a shapefile and coverage that outlines the area underlain by coals in the lower Blackhawk Formation, southern Wasatch Plateau coal assessment area. The polygons delimit the area within which resources were calculated and reported.
    map background search result map search result map Coal-mine production history from 1984 through 1995 in the Colorado Plateau coal assessment study area (cpmphg) Boundary delimiting the area within which coal resources were calculated, southern Wasatch Plateau (wsbndg) Final unioned file used for coal resource calculations, southern Wasatch Plateau, Central Utah (wsfing) Geologic faults in the So. Wasatch Plateau study area (wsfltg) Southern Wasatch Plateau geology, Utah (wsgeolg) Southern Wasatch Plateau coal mine locations, Utah (wsmng) Data points (drill locations) used in the assessment of coal in the southern Wasatch Plateau, UT (wsptg) The Sufco Mine in the southern Wasatch Plateau, Utah (wssfmng) Structure contours on top of the Star Point Sandstone, southern Wasatch Plateau, UT (wsstrcg) Isopachs of total net coal, lower Blackhawk Formation, southern Wasatch Plateau, UT (wsthkg) Data Release for Holocene Paleohydrology from alpine lake sediment, Emerald Lake, Wasatch Plateau of central Utah, USA Data Release for Holocene Paleohydrology from alpine lake sediment, Emerald Lake, Wasatch Plateau of central Utah, USA The Sufco Mine in the southern Wasatch Plateau, Utah (wssfmng) Southern Wasatch Plateau coal mine locations, Utah (wsmng) Boundary delimiting the area within which coal resources were calculated, southern Wasatch Plateau (wsbndg) Isopachs of total net coal, lower Blackhawk Formation, southern Wasatch Plateau, UT (wsthkg) Final unioned file used for coal resource calculations, southern Wasatch Plateau, Central Utah (wsfing) Geologic faults in the So. Wasatch Plateau study area (wsfltg) Structure contours on top of the Star Point Sandstone, southern Wasatch Plateau, UT (wsstrcg) Data points (drill locations) used in the assessment of coal in the southern Wasatch Plateau, UT (wsptg) Southern Wasatch Plateau geology, Utah (wsgeolg) Coal-mine production history from 1984 through 1995 in the Colorado Plateau coal assessment study area (cpmphg)