Filters: Tags: Columbia River Gorge National Scenic Area (X)
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This data release provides access to a low-altitude aeromagnetic survey flown over a part of the Cascade Range of the US Pacific Northwest, approximately centered over the town of Cascade Locks, Oregon. The Cascade Locks magnetic survey encompasses two large stratovolcanoes of the Cascade Range: Mt. Hood (3426 m) in Oregon and Mt. Adams (3742 m) in Washington. Data were acquired between October 17, 2021, and February 26, 2022, by KBM Resources Group, Thunder Bay, Ontario, Canada, working under contract to the U.S. Geological Survey. The survey is underlain by a diverse magnetic terrane, including Miocene flood basalts of the Columbia River Basalt Group and Tertiary to Quaternary volcanic and intrusive rocks of the...
Categories: Data;
Tags: Cascade Range,
Cascadia,
Clackamas County,
Clark County,
Columbia River Gorge National Scenic Area,
This table contains geochemical data collected for whole-rock samples from the Columbia River Basalt Group in the western Columbia River Gorge in Oregon and Washington. Most samples were collected by Russell C. Evarts and Richard M. Conrey from 2002 to 2014. Samples were collected during traverses along roads, streams, ridgecrests, and other areas as part of ongoing geologic mapping. Additional samples were provided by Marvin H. Beeson. Major- and trace-element analyses were performed by X-ray fluorescence at the Peter Hooper GeoAnalytical Laboratory at Washington State University in Pullman, Washington. No normalization has been applied to these data.
Land Use Designations. Updated with 8o. Exterior boundary updated with the May 2007 updated NSA exterior boundary. Resulted in some small polygons where the old boundary GIS did not capture. Requires a planner to look at and approve - process started late 2007, unknown completion date. Other areas that require FS and planner verification have been brough to the attention of GC and FS early 2007. Updated June 30th by fixing odd or incorrect attributes. Zoned as GMA but managed as SMA? If the forest service purchases land that has gone GMA, they will manage like SMA. If a private owner has land in the SMA that goes GMA, it is managed GMA. Last updated 11.09.2009 with Congressional 2000 and Plan Review 2004 changes.
This dataset contains polygons representing deposits of hyaloclastic debris that were generated between about 3.5 and 3.0 million years ago when a series of basaltic lava flows entered the canyon of the ancestral Columbia River. The lava flows were erupted from volcanoes in the area of the Hood River graben of McClaughry and others (2012), generally have low-potassium tholeiitic basalt composition, and were part of a widespread pulse of mafic volcanism in the northern Oregon Cascade Range that occurred between about 4.4 and 2.1 million years ago (Conrey and others, 1996). Lava flows that entered the ancestral Columbia River were rapidly chilled and fragmented during interaction with water (Trimble, 1963, Swanson,...
Categories: Data;
Types: Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Clark County,
Columbia Gorge,
Columbia River,
Columbia River Gorge National Scenic Area,
Hood River,
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