AndreaBozzo/ceres-open-data-index huggingface dataset:
Yukon River bridge landslide: Preliminary geologic and geotechnical evaluation

This report presents the findings of a geologic and geotechnical evaluation of a landslide at the Yukon River bridge (the E.L. Patton Bridge). The Yukon River bridge landslide occurred in fall 2012 between approximately 375 and 575 feet west of the bridge. Although there was no damage to the bridge foundation, the landslide's close proximity to the bridge and concerns over additional failures prompted multiple evaluations, including landslide documentation, drainage assessments, and geotechnical studies. This report was prepared to convey the general characteristics of the rock mass, characteristics of rock discontinuities, and the geomorphic expression of the 2012 landslide in the vicinity of the bridge. We determined that the fractured bedrock and steep slopes in the bridge vicinity are prone to slope failure. However, this assessment should be considered preliminary and should not be used to determine areas of potential future slope instabilities. A significant amount of additional exploration and slope stability analysis is required to fully understand the landslide hazard in the area of the bridge, as well as the potential for reactivation and/or expansion of the 2012 landslide into adjacent slopes.

Tags: alluvial fan, alluvium, coastal and river hazards, colluvial deposits, colluvium, dalton highway, drainage patterns, earthquake related hazards, engineering, erosion, fracturing, geological process, geology, geomorphology, geotechnical, hazards, landslide, livengood quadrangle, loess, permafrost and periglacial, slope instability hazards, surficial, trans-alaska pipeline, translational landslide, transportation corridor, yukon river
Organization: State of Alaska
High-resolution lidar data for infrastructure corridors, Bettles 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, bettles 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
Bedrock geologic map database of the Caribou Creek area, Big Delta C-4 and D-4 quadrangles, east-central Alaska

Miscellaneous Publication 172, Bedrock geologic map database of the Caribou Creek area, Big Delta C-4 and D-4 quadrangles, east-central Alaska, presents 1:25,000 scale geologic mapping of the Caribou Creek area in the Big Delta C-4 Quadrangle, east-central Alaska. The Caribou Creek area is known for significant placer gold but no known lode gold source. Additionally, it is one of the few regions in interior Alaska where native bismuth has been reported in placers. During an 11-week field campaign in the summer of 2002, an area of approximately 200 km2 was mapped at a 1:25,000 scale to delineate the area's geologic rock units, identify structural elements and their relative orientation, and collect rock samples for the geochemical and geochronological analysis needed to develop a model for the geological evolution of the area and potential source of the area's abundant placer gold. The resultant bedrock geologic map was published as a component of a University of Alaska master's thesis (Lessard, 2006). This publication release provides a modern compilation of the thesis map's GIS data. 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://doi.org/10.14509/30866.

Tags: amphibolite, bonanza creek, bullfrog creek, butte creek, caribou creek, cretaceous, devonian, diorite, fairbanks mining district, gems, gems ncgmp09, granite, granodiorite, greenschist, greenstone, igneous, jurassic, marble, mesozoic, metamorphic, mississippian, no grub creek, orthogneiss, paleozoic, pasco creek, plutonic, plutons, quartz, quartzite, quaternary, rocks, salcha river, schist, sedimentary, tourmaline, volcanic
Organization: State of Alaska
Oil and Gas Seeps of the Puale Bay - Becharof Lake - Wide Bay Region, Northern Alaska Peninsula

The east side of the northern Alaska Peninsula near Puale Bay and the Iniskin Peninsula of Lower Cook Inlet have long held interest to exploration geologists due to their well developed oil and gas seeps, which spurred on the first active exploration and drilling efforts for petroleum in Alaska. Several oil rushes occurred in the early part of 20th century, primarily in two phases (1902-1905 and 1922-1926) in the area of Puale Bay and Becharof Lake. Unfortunately all of these wells produced only traces of hydrocarbons. Several subsequent deeper wells were drilled in Mesozoic strata of this region and nearby Wide Bay to the south, but like the earlier efforts, did not prove to be economical. Each oil and gas seep from this region is plotted on the map accompanying this report and their coordinates are listed in a table. Original published information concerning the seeps is reproduced. In addition, a single prominent solid hydrocarbon locality cited in the early literature is also discussed. Geochemical data is given for some of the seeps.

Tags: alaska peninsula, jurassic, kamishak formation, kialagvik formation, mesozoic, naknek formation, oil and gas, oil seeps, triassic
Organization: State of Alaska
40Ar/39Ar ages from the Selawik A-2, A-3 and A-4 and Candle B-5 quadrangles, Alaska

40Ar/39Ar data from seven plutonic samples and one metamorphic sample collected during mineral assessment studies in 1991 show that various rock units in the Selawik Hills plutonic complex were emplaced in the order syenite/monzonite (nonfoliated, 106.6 ± 0.8 Ma; foliated, 101.7 ± 0.7 Ma; both on hornblende), followed by nepheline syenite (103.7 ± 0.8 Ma on hornblende) and then quartz monzonite (100.4 ± 3.7 Ma on biotite). 40Ar/39Ar data from Granite Mountain hornblendes yielded ages slightly older, but overlapping, those from Selawik Hills. In this suite, the silica-undersaturated phase appears to be younger (105.7 ±0.8 Ma) than the silica-saturated phase(s) (106.8 ± 0.8 Ma and 107.1 ± 0.8 Ma).

Tags: 40ar/39ar, age dates, albian, analytical results, ar-ar, candle quadrangle, cretaceous, early cretaceous, geochronology, granite, granite mountain, hornblende, igneous rocks, mesozoic, plutonic rocks, selawik quadrangle
Organization: State of Alaska
Photogrammetric digital surface models and orthoimagery for the continuous coastline, Wales to Platinum, Alaska, segment N: Bethel to Eek

Aerial photographs of the coastline from Bethel to Eek were collected on May 1, 2016 - May 5, 2016. The photographs were processed using Structure-from-Motion (SfM) photogrammetric techniques. Global Positioning System (GPS) checkpoints were collected via a Global Navigation Satellite System (GNSS) survey conducted between August 15 and September 14, 2015. For the purposes of open access to elevation and orthoimagery datasets in coastal regions of Alaska, this collection is being released as a Raw Data File with an open end-user license. Orthoimages contain 4-band, 8-bit, unsigned raster data (red/green/blue/no data; file format-GeoTIFF; source-Fairbanks Fodar) with 20 cm GSD. No-data values are found in band 4 or shown as transparent in red/green/blue images. The file employs Lempel-Ziv-Welch (LZW) compression. Light exposures in the orthoimages are a result of daily weather conditions, which ranged from low cloud cover, rain, and full sun.

Tags: bethel, coastal, coastal and river, eek, engineering, engineering geology, environmental, geologic hazards, geology, geomorphology, hazards, marine geology, methods, raster image, surficial
Organization: State of Alaska
High-resolution lidar data for infrastructure corridors, Anchorage 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. Lake polygons represent areas of water bodies (excluding streams and rivers) > 150 square meteres, present at the time of lidar data collection.

Tags: alaska, alaska highway corridor, alaska pipeline, anchorage quadrangle, gasline, geomorphology, lidar, lidar lake polygons, proposed natural gas pipeline, remote sensing, shaded relief, state of, topographic map, trans-alaska pipeline
Organization: State of Alaska
Line, grid, and vector data, and maps for the airborne geophysical survey of the Moran Survey Area, Melozitna and Tanana quadrangles, central Alaska

This digital publication, GPR 2010-1, contains data produced from airborne geophysical surveys conducted in 2009 for the Moran survey area in the south-central Melozitna mining district, Melozitna and Tanana quadrangles, central Alaska. Aeromagnetic, electromagnetic (EM), and radiometric data were acquired by helicopter for about 653 sq miles. Fugro Airborne Survey's frequency-domain DIGHEM V system was used for the EM data. GPR 2010-1 includes (1) raw and processed linedata; (2) gridded, Google Earth, and Geotiff formats of the calculated linedata; (3) maps of the data; and (4) vector files of data contours and flight lines.

Tags: aeromagnetic data, aeromagnetic map, airborne geophysical survey, alaska, apparent resistivity data, apparent resistivity map, dighem v em system, digital elevation model, electromagnetic data, first vertical derivative, gamma ray survey, geophysics, hem survey, melozitna mining district, melozitna quadrangle, moran creek, moran dome, radiometric survey, state of, tanana quadrangle, yukon river
Organization: State of Alaska
Historically active volcanoes of Alaska

This data lists the historically active volcanoes of Alaska and the year of the last major eruptive event. The volcanoes listed meet at least one of the following criteria since 1700 CE: 1) Documented, unquestioned eruption OR 2) A strongly suspected eruption, often an eruption documented in a historical account with very little information. Current geologic knowledge must not contradict the eruption account, OR 3) Persistent (usually on the order of decades, but certainly longer than several months) fumaroles, with temperatures (where measured) within approximately 10 degrees C of the boiling point, OR 4) Significant, measured, volcanic-related, non-eruptive deformation, OR 5) Documented earthquake swarm with strongly suspected volcanic cause. All files can be downloaded free of charge from the DGGS website (http://doi.org/10.14509/30142).

Tags: active volcanoes, alaska, alaska peninsula, alaska statewide maps, aleutian arc, aleutian islands, coastal and river, coastal and river hazards, geologic hazards, geology, hazards, historic eruption, state of, volcanic, volcanic eruption, volcano hazards, volcanoes, volcanology
Organization: State of Alaska
High-resolution lidar data for infrastructure corridors, Bettles 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, bettles quadrangle, gasline, geomorphology, lidar, lidar las file format, point cloud data, proposed natural gas pipeline, remote sensing, state of, trans-alaska pipeline
Organization: State of Alaska
Potential maximum permanent flooding maps for the communities of Chignik and Chignik Lagoon, Alaska

This digital data distribution package provides post-earthquake shorelines for coastal areas near Chignik and Chignik Lagoon, Alaska that become permanently flooded due to coseismic subsidence. Users can access the data, as well as additional metadata, from the DGGS website: http://doi.org/10.14509/29753.

Tags: active fault, alaska peninsula, chignik, chignik lagoon, coastal, coastal and river, earthquake, emergency preparedness, engineering, engineering geology, fault displacement, faulting, flood, geologic hazards, geology, hazards, inundation, land subsidence, marine geology, modeling, seismic hazards, tsunami
Organization: State of Alaska
Lidar-derived elevation data for the Utqiagvik-Atqasuk region, Alaska, collected August 2019

Lidar-derived elevation data for the Utqiagvik-Atqasuk region, Alaska, collected August 2019, Raw Data File 2022-10, provides classified point cloud, digital terrain model (DTM), surface model (DSM), and intensity model data for the communities of Utqiagvik and Atqasuk and surrounding areas. The data were collected in support of the Alaska Strategic Transportation and Resources (ASTAR) program for the purpose of investigating the potential for future road infrastructure connecting the communities. Aerial lidar data were collected between August 19 and 23, 2019, and subsequently processed using a suite of geospatial processing software. These products are released as a Raw Data File with an open end-user license. All files can be downloaded from the Alaska Division of Geological & Geophysical Surveys website (http://doi.org/10.14509/30870).

Tags: aerial, aerial geology, akilloaq, amungna, atqasuk, avak creek, beaded creek, browerville, cape smyth, city of atqasuk, coastal, coastal and river, dggs, digital elevation model, digital surface model (dsm), digital terrain model, ekalgruak lake, elevation, emaiksoun lake, engineering, engineering geology, environmental, evrulivik lake, footprint lake, geologic, geologic hazards, geological process, geology, geomorphology, geospatial accuracy, geotechnical, goose point, hydrology, igtuluwik, ikmakrak lake, ikroavik lake, imikpuk lake, inaru river, ireniviq, isatkoak lagoon, isatkoak reservoir, kigakrak, kikoligarak creek, kiku, kilusiktok lake, kimouksik lake, kugoosuguru, kuogaguruq, lake sungovoak, lidar, lidar intensity image, lidar las file format, mayoeak river, napawrax, natirnuq, nerravak lagoon, nigisaktuvik river, niklavik creek, nulavik, nunavak bay, pingoakeok lake, point cloud data, point shedden, qaaliiq, raster image, raster index shapefile, remote sensing, saatkunak, sikulik lake, sinaru, singaruak creek, singat creek, sixtukak, slope instability, sukok lake, surface, surface fault rupture, surficial, surficial geology, tekegakrok point, tikigaruk point, tractor lake, tuapaktushak creek, unconsolidated deposits, usuktuk river, utqiagvik, walakpa river, web service
Organization: State of Alaska
40Ar/39Ar data from the Tanacross D-1 and parts of the D-2, C-1, and C-2 quadrangles, Alaska

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 Northeast Tanacross map area in the Tanacross D-1 and parts of the D-2, C-1, and C-2 quadrangles, Alaska. Field samples were collected by the DGGS Mineral Resources section during detailed geologic mapping campaigns in 2017 and 2018. The Northeast Tanacross map area lies within the Yukon-Tanana Upland and covers the boundary between the Fortymile River and Lake George assemblages. The map area encompasses documented porphyry Cu-Mo-Au deposits including Taurus, Fishhook (also known as SW Pika), and Pika Canyon, and is adjacent to the Fortymile Mining District. The age data in this report constrain the crystallization ages of igneous rocks and the cooling histories of metamorphic rocks in the map area and will be used to improve upon recent mapping and further refine the uplift history of eastern Interior Alaska. The complete report and digital data are available through the DGGS website: http://doi.org/10.14509/30466.

Tags: 40ar/39ar, divide mountain, dude creek, fishhook bend, fortymile river assemblage, geochronology, gold bar creek, igneous, igneous rocks, lake george assemblage, liberty creek, mccord creek, mcelfish creek, metamorphic, metamorphic rocks, mineral assessment, mineral resources, minerals, north fork ladue river, sixtymile river
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. Bare-earth digital elevation models (DEM) represent the earth's surface with all vegetation and human-made structures removed.

Tags: alaska, alaska highway corridor, alaska pipeline, bare-earth digital elevation model (dem), gasline, geomorphology, lidar, proposed natural gas pipeline, raster image, remote sensing, state of, tanacross quadrangle, trans-alaska pipeline
Organization: State of Alaska
Shoreline change at Alaska coastal communities, Newtok, 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, newtok, outreach, sea level changes, shelf, shoreface, storm surge, surface, tides, topography, water
Organization: State of Alaska
Northeastern Tanacross geologic map, Tanacross D-1, D-2, C-1, and C-2 quadrangles, Alaska

The Mineral Resources section of the Alaska Division of Geological & Geophysical Surveys (DGGS) conducted 500 mi2 of 1:63,360-scale geologic mapping in the northeastern Tanacross Quadrangle (Tanacross D-1, and parts of the C-1, C-2, and D-2 quadrangles), located 15 miles southeast of Chicken, Alaska. The project took place during two periods: a reconnaissance mapping effort June 12-22, 2017, and a detailed campaign from June 18 to July 16, 2018. This map is located within an area of current industry interest; it includes the Taurus porphyry copper-gold-molybdenum +/- rhenium deposit and several other occurrence types, including gold, copper, and molybdenum in porphyritic intrusions, structurally controlled silver-lead-zinc prospects, and placer gold deposits. This map includes unconsolidated surficial deposits in the Tanacross D-1 Quadrangle, the eastern one-third of the Tanacross D-2 Quadrangle, the northern half of the Tanacross B-2 Quadrangle and the northeastern one-third of the Tanacross B-2 Quadrangle. Surficial geology was primarily mapped by interpreting 2.5-m-resolution SPOT 5 color-infrared and natural color red-green-blue (RGB) imagery collected in 2009 and 2010 and stereoscopic pairs of approximately 1:65,000-scale, false-color, infrared aerial photographs taken in 1978 and 1981. Surficial mapping was augmented with helicopter-supported fieldwork June 20-23, 2017 and July 3-4, 2018 to visit exposures and check geologic mapping. The complete report and digital data are available from the DGGS website: http://doi.org/10.14509/30197.

Tags: age dates, alluvium, amphibolite, ar-ar, augen gneiss, bedrock, bedrock creek, bedrock geologic map, bedrock geology, big timber creek, cherry creek, colluvium, cretaceous, crow creek, devonian, dewey creek, divide mountain, dude creek, fishhook bend, fortymile assemblage, gems ncgmp09, geologic, geologic map, geological process, geology, geomorphology, gneiss, gold bar creek, lake george assemblage, late cretaceous, liberty creek, marble, mccord creek, mcelfish creek, mckinley creek, mineral assessment, mineral deposit, mineral exploration, mineral localities, mineral prospect, mineral resources, minerals, mining, mississippian, nasina assemblage, north fork ladue river, orthogneiss, paleozoic, permian, prindle volcano, quaternary, rock units, schist, sixtymile river, statemap project, surface, surficial, surficial geology, tertiary, tom paine creek, triassic, u-pb, volcanic, volcanic rocks, volcaniclastic deposits, volcaniclastics
Organization: State of Alaska