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A database of geologic map of Three Sisters Volcanic Cluster as described in the original abstract: The geologic map represents part of a late Quaternary volcanic field within which scores of eruptions have taken place over the last 50,000 years, some as recently as ~1,500 years ago. No rocks of early Pleistocene (or greater) age crop out within the map area, although volcanic and derivative sedimentary rocks of Miocene and Pliocene age are widespread to the east and west and are certainly buried beneath the younger volcanic field. Of the 145 volcanic map units described herein, only 22 are certainly older than late Pleistocene (>126 ka), and 12 are postglacial (<15 ka). The oldest unit identified yields an age...
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This is a database of the geologic map of the Lassen Peak, Chaos Crags, and Upper Hat Creek volcanic area as described in the original abstract: The Lassen Peak, Chaos Crags, and Upper Hat Creek map area lies near the southern end of the Cascade Range in northern California. The map area includes parts of the three elements that together form the Lassen volcanic center: the Lassen dacitic dome field, the Central Plateau andesitic lava field, and the underlying deeply eroded and partly altered Brokeoff andesitic stratocone. The Lassen volcanic center is the southernmost active long-lived center of the present-day Cascades volcanic arc. This geologic map contributes to understanding the youngest major volcanic events...
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The Tyonek area in the northwestern Cook Inlet trough is rich in petroleum, coal, geothermal, aggregate, and timber resources, but the detailed geologic mapping necessary for planning future resource development exists only in part of the area. This report and geologic map provide basic surficial-geologic information useful for exploiting those resources and planning future utility corridor developments. In addition to mapping of surficial geologic units, we provide discussion of strategraphic evidence pertaining to physiographic relations and geologic history of volcaniclastic deposits derived from ancestral Mount Spurr, multiple phases of Quaternary glacial activity, Chakachatna River valley landslide complexes...
Tags: Alaska Earthquake 1964, Alluvial Fan, Beluga Plateau, Beluga River, Blockade Glacier, All tags...
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Debris flows, debris avalanches, mud flows and lahars arefast-moving landslides that occur in a wide variety of environmentsthroughout the world. They are particularly dangerous to life andproperty because they move quickly, destroy objects in their paths,and can strike with little warning. The purpose of this map is toshow where debris flows have occurred in the conterminous UnitedStates and where these slope movements might be expected in thefuture.
Tags: 1500 - Hazards, 1503 - Landslides, 3200 - Raster, 3220 - Grid, Alabama, All tags...
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Debris flows, debris avalanches, mud flows and lahars arefast-moving landslides that occur in a wide variety of environmentsthroughout the world. They are particularly dangerous to life andproperty because they move quickly, destroy objects in their paths,and can strike with little warning. The purpose of this map is toshow where debris flows have occurred in the conterminous UnitedStates and where these slope movements might be expected in thefuture.
Tags: 1500 - Hazards, 1503 - Landslides, 3100 - Vector, 3110 - ESRI, 3112 - export, All tags...


    map background search result map search result map Map showing inventory and regional susceptibility forHolocene debris flows and related fast moving landslides inthe conterminous United States: Raster data Map showing inventory and regional susceptibility forHolocene debris flows and related fast moving landslides inthe conterminous United States: vector data Surficial geology of the Tyonek area, south-central Tyonek Quadrangle, Alaska Database for the Geologic Map of the Lassen Peak, Chaos Crags, and Upper Hat Creek Area, California Database for the Geologic Map of Three Sisters Volcanic Cluster, Cascade Range, Oregon Database for the Geologic Map of the Lassen Peak, Chaos Crags, and Upper Hat Creek Area, California Database for the Geologic Map of Three Sisters Volcanic Cluster, Cascade Range, Oregon Surficial geology of the Tyonek area, south-central Tyonek Quadrangle, Alaska Map showing inventory and regional susceptibility forHolocene debris flows and related fast moving landslides inthe conterminous United States: vector data Map showing inventory and regional susceptibility forHolocene debris flows and related fast moving landslides inthe conterminous United States: Raster data