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This data release provides access to an aeromagnetic survey over a part of northeastern California, an area that includes the city of Alturas, California. The survey extends across the Devils Garden part of the Modoc Plateau (west of the Warner Range) and westward to over Medicine Lake volcano. The survey covers the Likely fault zone, an enigmatic northwest-striking set of structures with possible Quaternary activity, and extends south across the Madelaine Plains. These data were acquired between September 24 and November 2, 2019, by EDCON-PRJ, Inc., working under contract to the U.S. Geological Survey. The nominal flying height was based on a best fit, pre-planned, three-dimensional draped surface targeted...
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This data release contains gridded aeromagnetic data from a dataset that merges two aeromagnetic surveys of northeastern California. Data from the Alturas and Burney surveys were gridded and merged to provide a continuous, detailed aeromagnetic dataset of the region. The merged dataset was then corrected for the inclination of the Earth's magnetic field (reduced to pole or rtp); match-filtering of the merged rtp gridded dataset provides three dipole-equivalent source layers at 0.85 km (shallow), 3.28 km (medium), and 16.4 (deep) km. Magnetization boundaries were calculated using the maximum horizontal gradient method on the match-filtered gridded data. Lastly, a magnetic field caused by magnetic terrain was calculated...
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The Mount Dome pronghorn herd contains a mixture of residents and short distance, elevation-based migrants, but this herd does not migrate between traditional summer and winter seasonal ranges. Instead, much of the herd displays a somewhat nomadic migratory tendency, slowly moving up or down elevational gradients. Long distance movements from this herd are rare since it is largely surrounded by geographical and anthropogenic features with low permeability to movement. Some individuals used higher elevation areas throughout the summer, though this pattern was not ubiquitous. Therefore, annual home ranges were modeled using year-round data to demarcate high use areas (fig. XXX). Drought, increasing fire frequency,...
    map background search result map search result map USGS 1:24000-scale Quadrangle for Canby, OR 1954 USGS 1:24000-scale Quadrangle for Canby, OR 1961 USGS 1:24000-scale Quadrangle for Canby, OR 1961 USGS 1:24000-scale Quadrangle for Canby, OR 1975 USGS 1:24000-scale Quadrangle for Canby, OR 1961 USGS 1:24000-scale Quadrangle for Canby, OR 1961 USGS 1:24000-scale Quadrangle for Canby, CA 1993 USGS 1:24000-scale Quadrangle for Canby, CA 1990 USGS 1:24000-scale Quadrangle for Canby, IA 1971 USGS 1:24000-scale Quadrangle for Canby, IA 1971 USGS 1:62500-scale Quadrangle for Canby, CA 1961 USGS 1:62500-scale Quadrangle for Canby, CA 1961 USGS 1:24000-scale Quadrangle for Canby, MN 1967 USGS 1:62500-scale Quadrangle for Canby, CA 1961 USGS 1:24000-scale Quadrangle for Canby, CA 1990 Aeromagnetic Data of Alturas, California, and Surrounding Areas Aeromagnetic and derivative gridded data, and magnetization boundaries of northeastern California California Pronghorn Mount Dome Annual Range USGS 1:24000-scale Quadrangle for Canby, OR 1954 USGS 1:24000-scale Quadrangle for Canby, OR 1961 USGS 1:24000-scale Quadrangle for Canby, OR 1961 USGS 1:24000-scale Quadrangle for Canby, OR 1975 USGS 1:24000-scale Quadrangle for Canby, OR 1961 USGS 1:24000-scale Quadrangle for Canby, OR 1961 USGS 1:24000-scale Quadrangle for Canby, CA 1993 USGS 1:24000-scale Quadrangle for Canby, CA 1990 USGS 1:24000-scale Quadrangle for Canby, IA 1971 USGS 1:24000-scale Quadrangle for Canby, IA 1971 USGS 1:24000-scale Quadrangle for Canby, MN 1967 USGS 1:24000-scale Quadrangle for Canby, CA 1990 California Pronghorn Mount Dome Annual Range USGS 1:62500-scale Quadrangle for Canby, CA 1961 USGS 1:62500-scale Quadrangle for Canby, CA 1961 USGS 1:62500-scale Quadrangle for Canby, CA 1961 Aeromagnetic Data of Alturas, California, and Surrounding Areas Aeromagnetic and derivative gridded data, and magnetization boundaries of northeastern California