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This data release presents zircon U-Pb LA-ICP-MS geochronology from igneous rocks exposed in a coastal exposure at Ursus Head, Iliamna C-2 Quadrangle. Sills and dikes exposed in a coastal exposure at Ursus Head are deformed within the Bruin Bay fault zone. Common dikes intruding late Triassic Kamishak Formation strata composing the hanging-wall of the Bruin Bay fault are cut by numerous small-scale, low-angle, bedding-parallel, and high angle contractional faults. Sample 09MAW006A collected from one of many dikes deformed in the fault zone produced a uni-modal distribution of zircon ages of with a weighted mean of 206.92 +/-0.96 (2 sigma, n=47) and an MSWD of 1.1. Sample 09BG020C collected from a sill of more mafic...
    map background search result map search result map Zircon U-Pb and 40Ar/39Ar results from dikes collected within the Bruin Bay fault zone, lower Cook Inlet USGS 1:250000-scale Quadrangle for Naknek, AK 1952 USGS 1:250000-scale Quadrangle for Naknek, AK 1952 USGS 1:250000-scale Quadrangle for Naknek, AK 1952 USGS 1:250000-scale Quadrangle for Naknek, AK 1952 USGS 1:250000-scale Quadrangle for Naknek, AK 1952 USGS 1:250000-scale Quadrangle for Naknek, AK 1952 USGS 1:250000-scale Quadrangle for Naknek, AK 1952 USGS 1:250000-scale Quadrangle for Naknek, AK 1952 USGS 1:250000-scale Quadrangle for Naknek, AK 1952 USGS 1:250000-scale Quadrangle for Naknek, AK 1952 USGS 1:250000-scale Quadrangle for Naknek, AK 1964 Zircon U-Pb and 40Ar/39Ar results from dikes collected within the Bruin Bay fault zone, lower Cook Inlet USGS 1:250000-scale Quadrangle for Naknek, AK 1952 USGS 1:250000-scale Quadrangle for Naknek, AK 1952 USGS 1:250000-scale Quadrangle for Naknek, AK 1952 USGS 1:250000-scale Quadrangle for Naknek, AK 1952 USGS 1:250000-scale Quadrangle for Naknek, AK 1952 USGS 1:250000-scale Quadrangle for Naknek, AK 1952 USGS 1:250000-scale Quadrangle for Naknek, AK 1952 USGS 1:250000-scale Quadrangle for Naknek, AK 1952 USGS 1:250000-scale Quadrangle for Naknek, AK 1952 USGS 1:250000-scale Quadrangle for Naknek, AK 1952 USGS 1:250000-scale Quadrangle for Naknek, AK 1964