AndreaBozzo/ceres-open-data-index huggingface dataset:
Updated tsunami inundation maps for Homer and Seldovia, Alaska

We re-evaluate the potential tsunami hazard for the communities of Homer and Seldovia by numerically modeling the extent of inundation from tsunami waves generated by earthquakes and submarine landslides. Hypothetical worst-case scenarios are defined by analyzing the tsunami dynamics related to various plausible earthquake slip distributions along the Alaska-Aleutian megathrust. Potential tsunami sources include megathrust earthquakes in the Prince William Sound, Kenai Peninsula, and Kodiak Island regions. We consider scenarios similar to that of the 2011 Tohoku earthquake in Japan, with maximum slip located on a shallow portion of the plate interface close to the seafloor trench. We also consider local underwater slope failure scenarios for Kachemak Bay. The maximum predicted wave height from a tectonic tsunami is 10-12 m (33-40 ft) in Homer and 10-11 m (33-36 ft) in Seldovia, while the maximum landslide-generated tsunami may reach an elevation of up to 4 m (13 ft) on Homer Spit. In addition to Homer and Seldovia, we assessed the tsunami hazard for three small communities in Kachemak Bay: Seldovia Village, Jakolof Bay, and Kachemak Selo. Results presented here are intended to provide guidance to local emergency management agencies for tsunami inundation assessment, evacuation planning, and public education to mitigate future tsunami hazards. This report updates the previous assessment of tsunami hazard for Homer and Seldovia published in 2005. The complete report and digital data are available from the DGGS website: http://doi.org/10.14509/30095.

Tags: bathymetry, coastal, cook inlet, earthquake, earthquake related slope failure, engineering, engineering geology, faults, flood, geologic, geologic hazards, geological process, geology, geotechnical, hazards, homer, jakolof bay, kachemak bay, kachemak selo, kenai peninsula, landslide, seldovia, seldovia village, slides, slope, slope instability, slump, subduction, subsidence, surface, tectonics, topography, tsunami, uplift, water
Organization: State of Alaska
40Ar/39Ar data from the Tok River area, Tanacross A-5 and A-6 quadrangles and adjoining areas, eastern Alaska Range

This report presents 40Ar/39Ar step-heating geochronology results for igneous and metamorphic rocks from the Alaska Division of Geological & Geophysical Surveys' (DGGS) geologic mapping project in the Tanacross A-5 and A-6 quadrangles and adjoining areas. Our results indicate the Hona granodiorite pluton intruded the area in the Late Cretaceous between 76 and 71 Ma. We determined Cretaceous metamorphic ages from 126 to 121 Ma for hornblende, biotite, sericite and muscovite from multiple samples of upper greenschist to amphibolite grade rocks. This is consistent with regional argon results that imply this area is in the upper plate of the Yukon Tanana Terrane (Hansen and Dusel-Bacon, 1998). Basaltic andesite dikes returned Late Cretaceous (99.0 +/- 0.5 Ma) and Tertiary (58.4 +/- 0.3 Ma) ages from biotite; these constrain late brittle faulting in the area. Finally, we obtained a Late Cretaceous age (71.5 +/- 0.5) for a basaltic andesite flow; these ages constrain the timing of displacement on some of the faults in the map area. Analyses were performed by the University of Alaska Fairbanks (UAF) Geochronology Laboratory, and results were reported by Jeff Benowitz and Paul Layer. Products included in this data release are a summary of sample collection methods, the laboratory report, analytical data tables and associated metadata, and plots of the 40Ar/39Ar age spectra and Ca/K and Cl/K ratios.

Tags: 40ar/39ar, amphibolite, analyses, analyses and sampling, analytical lab results, analytical results, basalt, bedrock, cretaceous, crystals, exploration, faulting, geochronology, geologic, geology, gneiss, granite, granodiorite, greenschist, hona pluton, hornblende, igneous, isotopes, metamorphic, metamorphic rocks, metamorphism, methods, mica, mineral composition, mineral prospect, mineralogy, minerals, muscovite, noah prospect, plagioclase, plutonic, rocks, sample location, sericite, shalosky prospect, tanacross quadrangle, tertiary, tok, tok mining district, tok river, yukon-tanana terrane
Organization: State of Alaska
Geochemical reanalysis of historical U.S. Geological Survey sediment samples from the Inmachuk, Kugruk, Kiwalik, and Koyuk River drainages, Granite Mountain, and the northern Darby Mountains, Bendeleben, Candle, Kotzebue, and Solomon quadrangles, Alaska

The State of Alaska's Strategic and Critical Minerals (SCM) Assessment project, a State-funded Capital Improvement Project (CIP), is designed to evaluate Alaska's statewide potential for SCM resources. The SCM Assessment is being implemented by the Alaska Division of Geological & Geophysical Surveys (DGGS), and involves obtaining new airborne-geophysical, geological, and geochemical data. For the geochemical part of the SCM Assessment, thousands of historical geochemical samples from DGGS, U.S. Geological Survey (USGS), and U.S. Bureau of Mines archives are being reanalyzed by DGGS using modern, quantitative, geochemical-analytical methods. The objective is to update the statewide geochemical database to more clearly identify areas in Alaska with SCM potential. For this report, DGGS funded reanalysis of 1,682 historical USGS sediment samples from the statewide Alaska Geochemical Database Version 2.0 (AGDB2; Granitto and others, 2013). Samples were chosen from an area covering Inmachuk, Kugruk, Kiwalik, and Koyuk River drainages, Granite Mountain, and the northern Darby Mountains, Bendeleben, Candle, Kotzebue, and Solomon quadrangles, Alaska. USGS was responsible for sample retrieval from the Denver warehouse through the final quality assurance/quality control (QA/QC) of the geochemical analyses obtained through the USGS contract lab. The new geochemical data are published in this report as a coauthored DGGS report, and will be incorporated into the statewide geochemical databases of both agencies.

Tags: alaska, analyses, analyses and sampling, anchorage quadrangle, bendeleben quadrangle, candle quadrangle, chemistry, critical minerals, economic geology, economic study, geochemical data, geochemical surveys, geochemistry, geology, kotzebue quadrangle, mineral assessment, mineral deposit, mineral development, mineral localities, mineral prospect, mineral resources, minerals, non-metals, platinum group elements, precious metals, rare earth elements, ree, resource assessment, resource information, resources, sample location, sediment, solomon quadrangle, state of, strategic and critical minerals assessment project, strategic minerals, stream sediments, trace elements, trace geochemical, trace metals
Organization: State of Alaska
High-resolution lidar data for infrastructure corridors, Valdez Quadrangle, Alaska

In advance of design, permitting, and construction of a pipeline to deliver North Slope natural gas to out-of-state customers and Alaska communities, the Division of Geological & Geophysical Surveys (DGGS) has acquired lidar (light detection and ranging) data along proposed pipeline routes, nearby areas of infrastructure, and regions where significant geologic hazards have been identified. Lidar data will serve multiple purposes, but have primarily been collected to (1) evaluate active faulting, slope instability, thaw settlement, erosion, and other engineering constraints along proposed pipeline routes, and (2) provide a base layer for the state-federal GIS database that will be used to evaluate permit applications and construction plans. The digital surface model represents percent canopy cover (between 0 and 1). Cover metric was computed in Fusion (McGaughey 2007), which assesses the percentage of total first returns within each cell that were returned from the canopy. For more specifics on Fusion Gridmetric outputs see the fusion manual (page 56).

Tags: alaska, alaska highway corridor, alaska pipeline, gasline, geomorphology, lidar, lidar canopy cover, pipeline, proposed natural gas pipeline, raster image, remote sensing, state of, trans-alaska pipeline, valdez quadrangle
Organization: State of Alaska
Photogrammetry-derived digital surface model and orthoimagery of Valdez Glacier ice-dammed lake, Valdez, Alaska, October 15, 2014

The State of Alaska Division of Geological & Geophysical Surveys (DGGS) produced a digital surface model (DSM) and an orthorectified aerial image (orthoimagery, fig. 1) over an ice-dammed lake formed by Valdez Glacier. Aerial photographs and Global Navigation Satellite System (GNSS) data were collected on October 15, 2014, and were processed using Structure-from-Motion (SfM) photogrammetric techniques to create a DSM and orthoimagery. For the purpose of enabling open access to geospatial datasets in Alaska, this collection is being released as a Raw Data File with an open end-user license. All files can be downloaded free of charge from the DGGS website (http://doi.org/10.14509/30181).

Tags: coastal, coastal and river, engineering, engineering geology, environmental, flood, geologic, geologic hazards, geological process, glacial, glacial geomorphology, glacial lake, glacial processes, glacier flood, glacier outburst flood, glaciers, glaciology, ice, lake level, lakes, orthoimagery, structure from motion, surface, valdez, water
Organization: State of Alaska
Reconnaissance interpretation of 1978-1983 permafrost, Alaska Highway Corridor, Robertson River to Tetlin Junction, Alaska

During 2008 the Alaska Division of Geological & Geophysical Surveys (DGGS) conducted reconnaissance interpretive mapping of permafrost in Alaska Highway Corridor Segment 2, a 12-mi-wide (19.3-km-wide) corridor that straddles the Alaska Highway through the upper Tanana River valley from the eastern boundary of the Mt. Hayes Quadrangle to the eastern edge of the Tanacross Quadrangle. This work was an extension of permafrost mapping done in Alaska Highway Corridor Segment 1 from Delta Junction to Dot Lake in the Big Delta and Mt. Hayes Quadrangles during 2006-2007. Primarily, we inferred the extent of permafrost and ice content by interpreting ~1:65,000-scale, false-color infrared aerial photographs taken in July 1978, August 1980, and July 1983.

Tags: alaska, alaska highway corridor, alaska range, climate change, dot lake, engineering geology, gasline, geologic hazards, geologic map, geological process, geology, holocene, ice, permafrost, pingos, pleistocene, proposed natural gas pipeline, quaternary, remote sensing, robertson river, state of, subsidence, tanacross, tanacross quadrangle, taylor highway, thaw lakes, tok, tok river, transportation corridor
Organization: State of Alaska
High-resolution lidar data for infrastructure corridors, Tanacross Quadrangle, Alaska

In advance of design, permitting, and construction of a pipeline to deliver North Slope natural gas to out-of-state customers and Alaska communities, the Division of Geological & Geophysical Surveys (DGGS) has acquired LiDAR (Light Detection and Ranging) data along proposed pipeline routes, nearby areas of infrastructure, and regions where significant geologic hazards have been identified. LiDAR data will serve multiple purposes, but have primarily been collected to (1) evaluate active faulting, slope instability, thaw settlement, erosion, and other engineering constraints along proposed pipeline routes, and (2) provide a base layer for the state-federal GIS database that will be used to evaluate permit applications and construction plans. The dataset represents all classified laser returns from the LiDAR survey and their associated geospatial coordinates.

Tags: aerial geology, alaska, digital elevation model, digital surface model (dsm), geologic hazards, geology, geomorphology, hazards, holocene, lidar, lidar las file format, point cloud data, remote sensing, slope instability, state of, tanacross quadrangle, trans-alaska pipeline
Organization: State of Alaska
Active and potentially active faults in or near the Alaska Highway corridor, Dot Lake to Tetlin Junction, Alaska

In 2005, the Alaska Division of Geological & Geophysical Surveys initiated a multi-year geologic field study focused on a corridor centered along the Alaska Highway between Delta Junction and the Canada border. The purpose of this project is to provide geologic information relevant to a proposed Alaska-Canada natural gas pipeline and other future development in the corridor. The scope of this project includes identification of active faults and characterization of seismic hazards. During the 2008 field season the active fault studies were focused on the central part of the corridor between Dot Lake and Tetlin Junction. Field studies included helicopter and fixed-wing air reconnaissance augmented by interpretation of stereo air photos, remotely sensed images, ground reconnaissance, and field mapping. Detailed investigations were conducted where the reconnaissance identified lineaments indicative of Holocene surface faulting. In addition, detailed field studies were conducted of several lineaments identified in the published literature as possible active faults. The detailed studies included field mapping, topographic profiling, trenching, and 14C dating of surficial sediments associated with lineaments exhibiting characteristics of active faults. Two faults and a large fault-related anticline were found to have generated late Pleistocene and Holocene surface deformation in the Dot Lake-Tetlin Junction section of the corridor. These structures, the eastern part of the Dot "T" Johnson fault, the Cathedral Rapids fault, and the Giant Moletrack anticline, are active structures in the eastern part of the NFFTB. Detailed investigation of the Mansfield and Dennison Fork lineaments, identified as candidate active faults in the literature, produced conclusive evidence that they are not active faults. Detailed study of a third suspect lineament, the Bear Creek lineament, was inconclusive.

Tags: active fault, alaska highway corridor, c14, denali fault, dot lake, earthquake, faulting, faults, gasline, geologic hazards, holocene, pleistocene, proposed natural gas pipeline, quaternary, robertson river, strike-slip, structural geology, structure, tanacross, tanacross quadrangle, taylor highway, tectonics, tetlin, thrust, tok, tok river, transportation corridor, white river ash, yukon-tanana upland
Organization: State of Alaska
High-resolution lidar data for infrastructure corridors, Beechey Point Quadrangle, Alaska

In advance of design, permitting, and construction of a pipeline to deliver North Slope natural gas to out-of-state customers and Alaska communities, the Division of Geological & Geophysical Surveys (DGGS) has acquired LiDAR (Light Detection and Ranging) data along proposed pipeline routes, nearby areas of infrastructure, and regions where significant geologic hazards have been identified. LiDAR data will serve multiple purposes, but have primarily been collected to (1) evaluate active faulting, slope instability, thaw settlement, erosion, and other engineering constraints along proposed pipeline routes, and (2) provide a base layer for the state-federal GIS database that will be used to evaluate permit applications and construction plans. The dataset represents all classified laser returns from the LiDAR survey and their associated geospatial coordinates.

Tags: aerial geology, alaska, beechey point quadrangle, digital elevation model, digital surface model (dsm), geologic hazards, geology, geomorphology, hazards, holocene, lidar, lidar las file format, point cloud data, remote sensing, slope instability, state of, trans-alaska pipeline
Organization: State of Alaska
High-resolution lidar data for infrastructure corridors, Sagavanirktok Quadrangle, Alaska

In advance of design, permitting, and construction of a pipeline to deliver North Slope natural gas to out-of-state customers and Alaska communities, the Division of Geological & Geophysical Surveys (DGGS) has acquired lidar (Light Detection and Ranging) data along proposed pipeline routes, nearby areas of infrastructure, and regions where significant geologic hazards have been identified. Lidar data will serve multiple purposes, but have primarily been collected to (1) evaluate active faulting, slope instability, thaw settlement, erosion, and other engineering constraints along proposed pipeline routes, and (2) provide a base layer for the state-federal GIS database that will be used to evaluate permit applications and construction plans. The dataset represents all classified laser returns from the lidar survey and their associated geospatial coordinates.

Tags: alaska, alaska highway corridor, alaska pipeline, gasline, geomorphology, lidar, lidar las file format, point cloud data, proposed natural gas pipeline, remote sensing, sagavanirktok quadrangle, state of, trans-alaska pipeline
Organization: State of Alaska
W00226: NOS Hydrographic Survey , Outside Source Data Surveys - 2009, 2006-03-05

The National Oceanic and Atmospheric Administration (NOAA) has the statutory mandate to collect hydrographic data in support of nautical chart compilation for safe navigation and to provide background data for engineers, scientific, and other commercial and industrial activities. Hydrographic survey data primarily consist of water depths, but may also include features (e.g. rocks, wrecks), navigation aids, shoreline identification, and bottom type information.
							NOAA is responsible for archiving and distributing the source data as described in this metadata record.

Tags: acoustic sounders, american samoa, banktop and slope environments manua, bathymetry, bathymetry/seafloor topography, central pacific ocean, continent, doc/noaa/nesdis/ncei, doc/noaa/nesdis/ngdc, earth remote sensing instruments, earth science, global positioning system/inertial measurement unit, gps, gps receivers, gps/imu, hydrographic surveys for selected locations within the united states (hydro_bathy_2006), in situ ocean-based platforms, in situ/laboratory instruments, marine sediments, mbes, msbs, multibeam mapping system, multibeam swath bathymetry system, national centers for environmental information, national geophysical data center, nesdis, noaa, north america, ocean, oceans, pacific ocean, passive remote sensing, positioning/navigation, profilers/sounders, seafloor topography, sediment composition, ships, sonar, sound navigation and ranging, u.s. department of commerce, united states of america, water depth
Organization: National Oceanic and Atmospheric Administration, Department of Commerce
Beaver Creek electromagnetic and magnetic airborne geophysical survey data compilation

The Beaver Creek survey is one of several geophysical surveys, collectively known as the Five Spot project (Southern Dishna River, Beaver Creek, and Fox Hills surveys), located in the Iditarod-Innoko and Aniak mining districts, which is about 575 km southwest from Fairbanks, Alaska. Frequency domain electromagnetic and magnetic data were collected with the DIGHEMV system from September to November 2012. A total of 1771.2 line kilometers were collected covering 620.0 square kilometers for the Beaver Creek survey. Line spacing was 400 meters (m). Data were collected 30 m above the ground surface from a helicopter towed sensor platform ('bird') on a 30 m long line. The data, as well as additional metadata, are available from the DGGS website: http://doi.org/10.14509/29821.

Tags: aeromagnetic, aeromagnetic data, aeromagnetic map, aeromagnetic survey, airborne geophysical survey, analytic signal, aniak mining district, apparent resistivity data, apparent resistivity map, apparent resistivity survey, barnhard creek, beaver creek, bonanza creek, conductivity survey, doherty creek, eldorado creek, electromagnetic data, electromagnetic survey, exploration, first vertical derivative, frequency domain electromagnetic data, geologic, geology, geophysical map, geophysical survey, geophysics, geophysics search tag, george river, gridded data, iditarod mining district, innoko mining district, line data, little moose creek, long creek, magnetic data, magnetic survey, magnetics, moose creek, remote sensing, resistivity, resistivity survey, ruby creek, starr creek
Organization: State of Alaska
High-resolution lidar data for infrastructure corridors, Livengood Quadrangle, Alaska

In advance of design, permitting, and construction of a pipeline to deliver North Slope natural gas to out-of-state customers and Alaska communities, the Division of Geological & Geophysical Surveys (DGGS) has acquired lidar (light detection and ranging) data along proposed pipeline routes, nearby areas of infrastructure, and regions where significant geologic hazards have been identified. Lidar data will serve multiple purposes, but have primarily been collected to (1) evaluate active faulting, slope instability, thaw settlement, erosion, and other engineering constraints along proposed pipeline routes, and (2) provide a base layer for the state-federal GIS database that will be used to evaluate permit applications and construction plans. The vegetation digital surface models (veg_DSM) represent the above ground elevation of the highest laser return with all vegetation greater than 20 cm above the ground included.

Tags: alaska, alaska highway corridor, alaska pipeline, digital surface model (dsm), gasline, geomorphology, lidar, livengood quadrangle, proposed natural gas pipeline, raster image, remote sensing, state of, trans-alaska pipeline, vegetation digital surface model (dsm)
Organization: State of Alaska
40Ar/39Ar data, Styx River map area, Lime Hills C-1 Quadrangle, Alaska

This DGGS Raw Data File presents 40Ar/39Ar age dating results for selected igneous rocks encountered in the Styx River area of the western Alaska Range. Crystallization ages on biotite and hornblende from plutonic rocks range from about ~60 to ~63 Ma, while a sericite alteration age in plutonic rocks altered by a dike swarm also is around ~63 Ma. Sericite alteration associated with a copper-molybdenum porphyry ranges from ~10 to ~11 Ma. Analyses were performed by the University of Alaska Fairbanks Geochronology Laboratory, and results were reported by Paul Layer and Jeff Benowitz. This data release includes the following products: a summary of sample collection methods, the laboratory report, analytical data tables and associated metadata, and plots of the 40Ar/39Ar age spectra, Ca/K, and Cl/K ratios. All components of this data release are downloadable from the DGGS website at no charge.

Tags: 40ar/39ar, age dates, airborne geophysical survey, alaska range, analyses and sampling, analytical results, ar-ar, bedrock geology, copper, cretaceous, economic geology, faults, fracturing, geochronology, geology, gold, hornblende, jurassic, k-feldspar, lab methods, lime hills quadrangle, mica, mineral deposit, mineral prospect, mineralogy, minerals, mining, mining claims, miocene, molybdenite, muscovite, ore deposit model, plutonic rocks, plutons, polymetallic vein, porphyry, pyrite, pyrrhotite, quartz, sample location, sericite, sericite alteration, styx river, tertiary, volcanic rocks
Organization: State of Alaska