AndreaBozzo/ceres-open-data-index huggingface dataset:
Single-beam bathymetry data near Kotlik, Alaska, collected July 2021

DGGS Raw Data File 2021-14, Single-beam bathymetry data near Kotlik, Alaska, collected July 2021, presents bathymetric data for the purpose of assessing coastal hazards and for river migration studies. The State of Alaska Division of Geological & Geophysical Surveys (DGGS) used a M2Ocean Hydroball (an integrated echosounder, Global Navigation Satellite System (GNSS) antenna, and inclinometer) to collect bathymetric transects near Kotlik on July 7 and 9, 2021. Bathymetric data were corrected using a coincident water level time series referenced to a vertical datum using GNSS survey. The bathymetric data were processed using CIDCO DepthStar. This data collection is being released as a Raw Data File with an open end-user license. All files are available from the DGGS website: http://doi.org/10.14509/30764.

Tags: apoon pass, bathymetry, coastal and river, coastal and river hazards, dggs, emergency preparedness, engineering, engineering geology, environmental, erosion, flood, geologic, geologic hazards, geological process, geology, geomorphology, geotechnical, hazards, hydrology, kaelhuk pass, kanunuk slough, kotlik, kotlik river, kulmogon slough, kvichvauk pass, little kotlik river, nelutahalik creek, sediment, sediment transport, sedimentation, southwest alaska, surface, surface water, surficial, tatlalinguk pass, water, yukon-kuskokwim delta
Organization: State of Alaska
High-resolution lidar data for infrastructure corridors, Tanana 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. This digital surface model (mean_DSM) represents mean above-ground height of vegetation returns.

Tags: alaska, alaska highway corridor, alaska pipeline, digital surface model (dsm), gasline, geomorphology, lidar, mean vegetation elevation (dsm), proposed natural gas pipeline, raster image, remote sensing, state of, tanana quadrangle, trans-alaska pipeline, vegetation metric
Organization: State of Alaska
Quaternary Faults and Folds (QFF)

Alaska is the most seismically active region of the United States. However, little information exists on the location, style of deformation, and slip rates of Quaternary faults. This interactive map displays locations and relative activity of Alaska's faults and folds. The map offers zoom and scroll options, and multiple base map layers. Click individual fault and fold traces to view basic fault parameters: name, age, slip rate, slip sense, dip direction, mapping certainty, and mapped scale. This resource is intended to provide simple and quick means of visualizing structure locations and characteristics. Users must recognize mapping certainty and data accuracy limitations when zooming in farther than the stated mapped scale for a given feature and treat resulting visual representations with appropriate caveats. The structures displayed are replicated from DGGS publications MP 141 (Quaternary) and MP 150 (pre-Quaternary).

Tags: active fault, alaska, alaska statewide maps, alaska statewide quadrangle, earthquake, faulting, faults, folds, hazards, paleoseismology, quaternary, state of
Organization: State of Alaska
Reconnaissance interpretation of 1978-1981 permafrost, Alaska Highway corridor, Tetlin Junction to Canada border, Alaska

During 2009 the Alaska Division of Geological & Geophysical Surveys (DGGS) conducted reconnaissance interpretive mapping of permafrost in Alaska Highway Corridor Segment 3, a 12-mi-wide (19.3-km-wide) corridor that straddles the Alaska Highway through the Northway-Tanacross Lowland and the southern Yukon-Tanana Upland from Tetlin Junction to the Canada border. 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 and Alaska Highway Corridor Segment 2 from the Robertson River to Tetlin Junction in the Tanacross Quadrangles during 2008. 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 and August 1981.

Tags: alaska, alaska highway corridor, beaver creek, canada, chisana river, climate change, engineering geology, gasline, geologic hazards, geologic map, geological process, geology, holocene, ice, midway lake, nabesna, nabesna quadrangle, nabesna river, northway, northway junction, permafrost, pingos, pleistocene, proposed natural gas pipeline, quaternary, remote sensing, scottie creek, state of, subsidence, tanacross, tanacross quadrangle, tanana river, tetlin junction, tetlin national wildlife refuge, thaw lakes, transportation corridor
Organization: State of Alaska
Geologic notes on Granite Mountain, Mount Hayes D-3 Quadrangle, Alaska

In 2006-2007, Alaska Division of Geological & Geophysical Surveys (DGGS) geologists traversed and collected rock samples from ridges on the north side of Granite Mountain in the Mount Hayes D-3 Quadrangle to supplement existing literature with additional details about the variations in texture, lithology and orientation of the 'Granite of Granite Mountain' (map unit grgm) described by Nokleberg and others (1992). The digital data files for this report provide station locations and observations recorded in the geologists' field notes. Outcrop observations describe fine- to medium-grained granodiorite and medium- to coarse-grained tonalite units which appear to be in contact with each other on the ridges north of Granite Mountain. Mafic enclaves are common; mafic and felsic dikes transect the plutonic rocks. Slices of quartzite are either in faulted or intrusive contact within the pluton.

Tags: geology, granite, granite mountain, sample location, structural geology, structure
Organization: State of Alaska
Geologic map of the Big Delta B-1 Quadrangle, east-central Alaska

Scientific Investigations Map 2975, Geologic map of the Big Delta B-1 Quadrangle, east-central Alaska, provides detailed (1:63,360-scale) geologic mapping of the U.S. Geological Survey (USGS) Big Delta B-1 quadrangle. This data release is a conversion of the originating geospatial data published by the USGS and may include minor modifications necessary for schema compliance. The dataset contains geologic, structural, stratigraphic, and geochronologic data organized according to the GeMS and AK GeMS mapping schemas. The geodatabase and ESRI fonts and style files are available from the DGGS website: https://dggs.alaska.gov/pubs/id/23531.

Tags: alluvial, amphibolite, antimony creek, basalt, batholith, bedrock, black mountain, boulder creek, central creek, colluvium, contact, diorite, divide creek, dome, eocene, fan, faulting, fracturing, geochronology, geologic, geology, glacial, gneiss, gold, goodpaster mining district, goodpaster river, granite, granite creek, granodiorite, gravel, graywacke, grizzly bear mine, holocene, igneous, johnson creek, king creek, landslide, last chance creek, late cretaceous, late devonian, metamorphic, metamorphism, middle devonian, migmatite, minerals, monazite, orthogneiss, outwash, paleocene, pegmatite, pleistocene, plutonic, porphyry, quartzite, rhyolite, rocks, sandstone, schist, sediment, sedimentary, serpentine creek, slate creek, solifluction, summit creek, surface, surficial, terrace, tertiary, tibbs creek, wolverine creek
Organization: State of Alaska
Photogrammetric digital surface models and orthoimagery of EauClaire Place, December 5, 2018

The State of Alaska Division of Geological & Geophysical Surveys (DGGS) produced digital surface models (DSMs) and orthorectified aerial imagery (orthoimagery) over selected locations in the greater Anchorage area following the Mw 7.1 November 30, 2018, Anchorage earthquake. We selected areas of interest (AOIs) based on initial damage reports from the Alaska Department of Transportation & Public Facilities (DOT&PF) and the United States Geological Survey (USGS) in order to document earthquake effects. Aerial photographs collected December 5-6, 2018, were processed using Structure-from-Motion (SfM) photogrammetric techniques to create sub-meter DSMs and orthoimagery. This digital data set covers EauClaire Place and was collected on December 5, 2018. These data document ground conditions immediately following the 2018 Mw 7.1 Anchorage earthquake. For the purposes of open access to elevation and orthoimagery data sets throughout Alaska, this collection is being released as a Raw Data File with an open end-user license. The data and the data acquisition report are available from the DGGS website: https://elevation.alaska.gov/, http://doi.org/10.14509/30273.

Tags: aerial photography, anchorage, digital surface model (dsm), earthquake related hazards, earthquake related slope failure, elevation, engineering, fracturing, geologic, geologic hazards, geological process, geology, geomorphology, geotechnical, hazards, orthoimagery, photogrammetry, raster image, structure from motion, surficial geology, topography
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 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, livengood quadrangle, point cloud data, proposed natural gas pipeline, remote sensing, state of, trans-alaska pipeline
Organization: State of Alaska
Measured stratigraphic section in the upper Schrader Bluff Formation (Late Campanian-Maastrichtian?), Ivishak River, Alaska

Preliminary Interpretive Report 2021-3, Measured stratigraphic section in the upper Schrader Bluff Formation (Late Campanian-Maastrichtian?), Ivishak River, Alaska, presents results of U-Pb zircon geochronology analysis of an airfall-tephra deposit sampled from approximately 755.5 m above the base of the measured section. Zircon grains were separated and analyzed by Apatite to Zircon, Inc. via laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS). The U-Pb age is the first published robust radioisotopic age constraint for Upper Cretaceous rocks on the east-central North Slope. Thirty zircons were analyzed, yielding a range of dates (and uncertainties) that exceed the amount of dispersion expected for a single eruptive event. In order to derive a statistically valid and geologically reasonable eruption age, a weighted mean was calculated using a subset of the youngest grains. Grain date selection criteria for this subset is modeled after the detrital zircon literature where a variety of techniques have been proposed to derive maximum depositional ages (MDAs) for strata based on the youngest grain or grains within a sample. In this case, we favored a method for MDA calculation that selects a subpopulation based on the youngest cluster of three or more dates that overlap at +/- 2 sigma analytical uncertainty. A subpopulation of 20 out of 30 grains satisfied this selection criteria and resulted in a weighted mean age of 71.13 +/- 1.24 Ma. The reported weighted mean age 2 sigma uncertainty reflects both analytical uncertainty and an additional (generic) 1.5 percent (2 sigma) systematic uncertainty component. The new U-Pb age indicates the upper part of the measured section was deposited in the Early Maastrichtian. All files are available from the Alaska Division of Geological & Geophysical Surveys (DGGS) website: http://doi.org/10.14509/30693.

Tags: barrow trail member, bentonite, brookian, campanian, canning formation, channel, clay, correlation, energy, energy resources, exploration, formations, geochronology, geologic, highstand, interpretation, ivishak river, lowstand, maastrichtian, marine, measured sections, measured stratigraphic section, methods, nanushuk formation, national petroleum reserve-alaska, north slope, outcrop samples, petroleum, petrology, prince creek formation, regressive, rocks, rogers creek member, sandstone, schrader bluff formation, sedimentary, sedimentology, sentinel hill member, shale, shelf, siltstone, slope, stratigraphy, subsurface, surface, tephra, transgressive, u-pb, unconformity, zircon
Organization: State of Alaska
Iditarod survey area: Airborne magnetic and electromagnetic data in line, grid, vector, and map formats, and descriptive project report, Innoko, Iditarod, and McGrath mining districts, Iditarod and Ophir quadrangles, western Alaska

This digital publication, GPR 2011-4, contains Fugro Airborne Surveys' analysis and interpretation of data produced from airborne geophysical surveys published by DGGS in 2011 (GPR 2011-2) of the Iditarod survey area. Fugro Airborne Surveys' frequency-domain DIGHEM V system was used for the EM data. GPR 2011-4 includes (1) Fugro's project report with interpretation and detailed EM Anomalies in tabular format, (2) Multi-channel stacked profiles in pdf format, and (3) interpretation and em anomalies are each provided as Geotiffs and maps. The document gpr2011_004_readme (.txt and .pdf) lists all files included in this publication. Other supporting files include gpr2011-4_browsegraphic.pdf, gpr2011-4_emanomaly_readme.pdf. The airborne data were acquired and processed under contract between the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (DGGS), and Fugro GeoServices, Inc. Fugro Airborne Surveys, the subcontractor, acquired and processed the data in 2010 and 2011.

Tags: aeromagnetic, aeromagnetic data, aeromagnetic map, aeromagnetic survey, airborne geophysical / geological mineral inventory, airborne geophysical survey, alaska, apparent resistivity data, apparent resistivity map, apparent resistivity survey, dighem v em system, electromagnetic anomalies, electromagnetic data, electromagnetic survey, geophysical survey, geophysics, geophysics search tag, hem survey, iditarod mining district, iditarod quadrangle, innoko mining district, interpretation, magnetic survey, magnetics, mcgrath mining district, ophir quadrangle, project report, stacked multi-channel profiles, state of
Organization: State of Alaska
Shoreline change at Alaska coastal communities, Twin Hills, Alaska

The Division of Geological & Geophysical Surveys has analyzed long-term shoreline change at 48 Alaska communities. Shoreline datasets were compiled from previously published U.S. Geological Survey assessments and created from historical and recent aerial images by the Alaska Division of Geological & Geophysical Surveys. Shorelines were analyzed to calculate shoreline change rates every 25 meters along coastlines and tidally influenced riverbanks using the Digital Shoreline Analysis System (DSAS; Himmelstoss and others, 2018). The geodatabase for each community includes shoreline positions, the alongshore baseline used to cast transects, and transects that include shoreline change rates and statistics. All files can be downloaded free of charge from the Alaska Division of Geological & Geophysical Surveys website (http://doi.org/10.14509/30552).

Tags: aerial, aerial photography, alaska, coastal, dggs, emergency preparedness, engineering, environmental, erosion, flood, floodplain, geology, hazards, inundation, marine geology, outreach, sea level changes, shelf, shoreface, storm surge, surface, tides, topography, twin hills, water
Organization: State of Alaska
Geochemical, major-oxide, minor-oxide, trace-element and carbon data from rocks collected in 2008 in the eastern Bonnifield mining district, Fairbanks and Healy quadrangles, Alaska

Mineral-resources personnel from the Alaska Division of Geological & Geophysical Surveys carried out a geological field survey, including mapping and sampling in the eastern part of the Bonnifield mining district in the Fairbanks A-1, A-2, Healy D-1 and D-2 quadrangles, Alaska from June 16 to July 18, 2008. The fieldwork provides basic information critical to building an understanding of Alaska geology and is part of an integrated program of airborne geophysical surveys followed by geological mapping. During 2008, 242 rock samples were collected for geochemical trace-element analysis, 106 rock samples were collected for whole rock (major- and minor-oxide and petrogenetically important trace element) analyses, and 7 samples were collected for analysis of non-carbonate carbon content.

Tags: alaska, alaska range, buzby prospect, chute creek, cretaceous, denali borough, devonian, dry creek, dry creek placer mine, dry creek prospect, fairbanks quadrangle, forgotten creek, geochemistry, glacier creek, glory creek, glory creek prospect, healy quadrangle, healy schist, kansas creek, kansas creek prospect, keevy peak formation, lea creek prospect, major oxides, mississippian, newman creek, newman creek placer mine, red mountain creek, red mountain creek prospect, rogers creek, sheep creek, slate creek, slide creek, smog prospect, snow mountain gulch, state of, statemap project, stream sediments, tertiary, threemile creek, totatlanika schist, trace metals, west fork little delta river, wood river, wtf (western tundra flats) prospect
Organization: State of Alaska
High-resolution lidar data for infrastructure corridors, Chandalar 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, chandalar quadrangle, gasline, geomorphology, lidar, lidar canopy cover, pipeline, proposed natural gas pipeline, raster image, remote sensing, state of, trans-alaska pipeline
Organization: State of Alaska
High-resolution lidar data for infrastructure corridors, Fairbanks 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 normalized digital surface models (nDSM) represent the above ground elevation of the highest laser return with all vegetation included.

Tags: alaska, alaska highway corridor, alaska pipeline, data normalized digital surface model (ndsm), fairbanks quadrangle, gasline, geomorphology, lidar, proposed natural gas pipeline, raster image, remote sensing, state of, trans-alaska pipeline
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 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, proposed natural gas pipeline, raster image, remote sensing, state of, trans-alaska pipeline, valdez quadrangle, vegetation digital surface model (dsm)
Organization: State of Alaska
Engineering-geologic map of the Eagle A-1 Quadrangle, Fortymile mining district, Alaska

The Alaska Division of Geological & Geophysical Surveys (DGGS) has conducted 1:63,360-scale geologic mapping of the Eagle A-1 Quadrangle. The area is part of the 100-year old Fortymile mining district and is located in eastern Alaska near the Alaska-Yukon border. This map illustrates potential near-surface sources of various geologic materials that may be useful for construction. Field observations indicate that each geologic unit (for example, stream alluvium) has a definite composition or range of composition. Therefore, the probable presence of materials is interpreted from the distribution of geologic units on the geologic map of this quadrangle. This map is generalized and is not intended to show exact locations of specific materials. Local variations are common, especially near unit boundaries. The map was derived electronically from the geologic map of the area using Geographic Information System (GIS) software. It is locally verified by ground observations during field visits. The results should be considered reconnaissance in nature.

Tags: alluvial deposits, alluvium, boundary (place), colluvial deposits, colluvium, construction materials, crushed gravel, crushed rock, decorative stone, drain rock, engineering, engineering geology, fortymile mining district, geologic hazards, geologic map, geologic materials, ground ice, jack wade junction, permafrost, photogeologic lineaments, pingos, rip rap, sand and gravel, statemap project, steele creek dome, taylor highway, thawing permafrost, top of the world highway, unconsolidated deposits, walker fork
Organization: State of Alaska