Filters: partyWithName: Natural Hazards (X) > Types: Downloadable (X) > partyWithName: U.S. Geological Survey, ALASKA REGION (X)

Filters Date Range Past year (0) Past month (0) Past week (0) Past day (0) Custom range... To   Search Extensions ArcGIS Service Definition (2) Raster (1) Types Map Service (3) ArcGIS REST Map Service (2) ArcGIS Service Definition (2) GeoTIFF (1) OGC WFS Layer (1) More... Contacts Joel E. Robinson Volcano Science Center U.S. Geological Survey - ScienceBase Adam Mosbrucker Joel E Robinson More... Categories Data (3) Tag Types Theme (3) Place (3) USGS Scientific Topic Keyword (2) Harvest Set (3) Tag Schemes None (3) Common geographic areas (2) Lithologic classification of geologic map units (1) USGS Thesaurus (2) Alexandria Digital Library Feature Type Thesaurus (1) ISO 19115 Topic Category (2) View Results as: JSON ATOM CSV

Database for the Geologic Map of the Bonanza Caldera Area, Northeastern San Juan Mountains, Colorado The San Juan Mountains in southwestern Colorado have long been recognized as a site of exceptionally voluminous mid-Tertiary volcanism, including at least 24 major ignimbrite sheets (each 150-5,000 km3) and associated caldera structures active at 33-23 Ma. More recent volcanologic and petrologic studies in the San Juan region have focused mainly on several ignimbrite-caldera systems: the southeastern area (Platoro complex), western calderas (Uncompahgre-Silverton-Lake City), the central cluster (La Garita-Creede calderas). The northeast San Juan region that was far less studied until recently occupies a transition between earlier volcanism in central Colorado and the larger-volume younger ignimbrite-caldera foci... Categories: Data; Types: ArcGIS REST Map Service, ArcGIS Service Definition, Downloadable, Map Service; Tags: Bonanza, Colorado, North America, Saguache, USGS Science Data Catalog (SDC), All tags... United States, Volcanology, caldera, explosive eruptions, geology, geology, volcanoes, Fewer tags High-resolution digital elevation model of Mount St. Helens and upper North Fork Toutle River basin, based on airborne lidar surveys of July-September, 2017 The lateral blast, debris avalanche, and lahars of the May 18th, 1980, eruption of Mount St. Helens, Washington, dramatically altered the surrounding landscape. Lava domes were extruded during the subsequent eruptive periods of 1980-1986 and 2004-2008. During 2017, U.S. Forest Service contracted the acquisitions of airborne lidar surveys of Mount St. Helens and upper North Fork Toutle River basin, part of a larger 2017-2018 survey of the Gifford Pinchot National Forest. The U.S. Geological Survey combined and reprojected 81 raster datasets, provided by the U.S. Forest Service in October 2018, into a single digital elevation model (DEM) of the ground surface, including beneath forest cover (that is, 'bare earth').... Categories: Data; Types: Downloadable, GeoTIFF, Map Service, Raster; Tags: ALS, Cascade Range, Cowlitz County, DEM, Ecology, All tags... Geochemistry, Geography, Geomorphology, Geophysics, Glaciology, Hydrology, Land Use Change, Loowit, Mount St. Helens, North Fork Toutle River, Remote Sensing, Sedimentology, Seismology, Soil Sciences, Structural Geology, Toutle River, USA, USGS Science Data Catalog (SDC), Volcanology, WA, Washington, Water Quality, Water Resources, airborne laser scanning, bare earth, biota, digital elevation model, elevation data, geomorphology, glacier, hydrology, lidar, light detection and ranging, sediment, topography, volcanic landforms, volcano, volcano, Fewer tags Database for the geologic map of the northern Harrat Rahat volcanic field, Kingdom of Saudi Arabia The Harrat Rahat volcanic field, located in the west-central part of the Kingdom of Saudi Arabia, is the largest of 15 harrats (Arabic for 'volcanic field') hosted within the Arabian plate. Harrat Rahat is 50 to 75 km wide (east-west) and 300 km long (north-south), covering an area of approximately 20,000 square kilometers and encompassing more than 900 observable vents. The overall map area and its dataset show the volcanic geology of the northern part (about 3,340 square kilometers) of Harrat Rahat, at a scale of 1:75,000. Two additional map areas and their feature classes highlight areas of interest at 1:25,000 scale. Northern Harrat Rahat is of interest owing to the location of the city of Al-Madinah Al-Munawarah... Categories: Data; Types: ArcGIS REST Map Service, ArcGIS Service Definition, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Al-Madinah Al-Munawarah, Basalt, Benmoreite, Harrat Rahat volcanic field, Lava flow, All tags... Mugearite, Saudi Arabia, Trachyte, USGS Science Data Catalog (SDC), geology, geoscientificInformation, volcanic activity, Fewer tags