Alaska Fault Map

Note that most faults that can affect residents are either onshore or just offshore. The various colors and line types indicate different ages of the most recent earthquakes on the fault and how well the location of the fault is constrained. For more details, see Quaternary Faults.Map showing Quaternary faults in the western U.S. and Pacific Ocean.

This data set represents part of a systematic effort to release geologic map data for the United States in a uniform manner. Geologic data in this data set has been compiled from a wide variety of sources, published and unpublished, ranging from state and regional geologic map to field mapping.

The National Seismic Hazard Maps developed by the USGS show the spatial probability of peak earthquake-driven ground motion levels. Since the last revisions to the map for Alaska in 2007, scientists have made significant advances in understanding active faulting, fault slip rates, and fault behavior.

Most people have heard of California's San Andreas fault, but few are familiar with the the Denali fault in Alaska which, on a topographic scale, is even more impressive than the San Andreas. Some Alaskan geologists even take the view that the San Andreas fault is merely a southern extension of the Denali--an opinion not overly popular with

Chugach-St. Elias fault This is a major strike-slip fault that runs through southeastern Alaska. 13. Rude RiverBagley fault Likely a strike-slip fault zone. 14. Cordova fault, Eyak fault, Etches fault, Rude River fault These faults vary in type, likely involving strike-slip or thrust mechanisms depending on local geology.

Geology of Alaska Map Viewer Help Geologic map of Alaska Alaska Resource Data File. Detailed Geology at Selected Location. Click on geologic unit for more information Oltpt Older rocks of York terrane and Grantley Harbor Fault zone Middle Ordovician to Proterozoic Pcs Clastic and volcaniclastic rocks Togiak-Tikchik Complex Permian

This U.S. Geological Survey feature layer displays uranium-lead, geochronology, radiometric ages, contacts, faults, geologic unit polygons, and relational data tables from the Geologic map of Alaska.

Title Geologic map of Alaska Edition 1.0 Geospatial_Data_Presentation_Form Vector Digital Data Set Series_Information Faults, stratigraphic contacts, dikes, lineations and other linear features are represented as arcs. When a fault is also a stratigraphic contact, only a single arc is present. Dangling arcs may be present fault, dike

Alaska Fault Trace Mapping, 2021. This dataset provides a detailed 110,000 digital map of fault and fold traces in Alaska, USA based on features identified in the freely available ArcticDEM 3.0. The fault traces represented in this dataset either revise the location and accuracy of known active faults or folds archived in the USGS Quaternary

This includes mapping active faults and folds to define seismic hazards, as well as documenting the primary and secondary effects of significant earthquakes Alaska Statute 41.08.017. DGGS is committed to facilitating and implementing geotechnical studies for a better understanding of active tectonics in Alaska and mitigating seismic hazard