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Cook Inlet has been recognized as the second-largest petroleum province in Alaska, second only to the North Slope. The south-central Tyonek Quadrangle is an area of significant geologic interest because it is the only location in Cook Inlet where the entire producing stratigraphy of the basin is exposed on the surface. Additionally, this area encompasses the structural boundary between the forearc basin and its sediment source rocks. To better understand the petroleum system and the geologic relationships between the exhumed arc intrusive rocks and adjacent Cenozoic stratigraphy of the Cook Inlet forearc basin, during the summer of 2010 the Alaska Division of Geological & Geophysical Surveys conducted a federally-funded...
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Alaska Division of Oil and Gas personnel collected and interpreted various data sources related to the interpretation of the Base Tertiary unconformity surface in the Cook Inlet Basin, Alaska.Data sources included public literature, public well data information (from the AOGCC-Alaska Oil and Gas Conservation Commission), a palynology database (Greater Cook Inlet Stratigraphic Palynology Control Database and Stud,Zippi, P.A., 2006) and over 2000 miles of 2D marine seismic data (CI-88 and CI-89 licensed from, and complements of, CGGVeritas.) Interpreted formation tops of the Base Tertiary unconformity are tabulated on the map.
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OBIS-USA brings together marine biological occurrence data – recorded observations of identifiable marine species at a known time and place, collected primarily from U.S. Waters or with U.S. funding. Coordinated by the Science Analytics and Synthesis (SAS) Program of the United States Geological Survey (USGS), OBIS-USA, strives to meet national data integration and dissemination needs for marine data about organisms and ecosystems. OBIS-USA is part of an international data sharing network (Ocean Biogeographic Information System, OBIS) coordinated by the Intergovernmental Oceanographic Commission, of UNESCO (United Nations Educational, Science and Cultural Organization) International Oceanographic Data and Information...
Tags: Arctic Ocean, Atlantic Ocean, Bay of Fundy, Beaufort Sea, Bering Sea, All tags...
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This service shows the Environmental Sensitivity Index (ESI) developed for the the outer coast of Washington in 1985. Both linear and polygonal shoreline features are included here. Associated GIS datasets can be downloaded here.ESI maps use shoreline rankings to rate how sensitive an area of shoreline would be to an oil spill. The ranking scale goes from 1 to 10.A rank of 1 represents shorelines with the least susceptibility to damage by oiling. Examples include steep, exposed rocky cliffs and banks. The oil cannot penetrate into the rock and will be washed off quickly by the waves and tides.A rank of 10 represents shorelines most likely to be damaged by oiling. Examples include protected, vegetated wetlands,...
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Between 27 and 11 kyr ago, during the last major (Naptowne) glaciation, the northwestern and western Kenai Peninsula and the Cook Inlet trough were covered by ice except for local nunataks and small refugia, like the Caribou Hills. Landforms related to four glacial stades are recognized and paleogeographic maps document ice limits, drainage systems, glacial-impounded lakes, and glaciomarine terraces. Numerous multidisciplinary studies of glacial, vegetation, and insect histories document Holocene climatic changes.
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This report contains all of the available daily sulfur dioxide andcarbon dioxide emission rates from Cook Inlet volcanoes asdetermined by the U.S. Geological Survey (USGS) from March 1990through July 1994. Airborne sulfur dioxide gas sampling of theCook Inlet volcanoes (Redoubt, Spurr, Iliamna, and Augustine)began in 1986 when several measurements were carried out atAugustine volcano during the eruption of 1986. Systematic monitoringfor sulfur dioxide and carbon dioxide began in March 1990 atRedoubt volcano and continues to the present. Intermittentmeasurements at Augustine and Iliamna volcanoes began in 1990 andcontinues to the present. Intermittent measurements began at Spurrvolcano in 1991, and were continued...
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The Alaska Division of Geological & Geological Surveys (DGGS) personnel collected rock samples while conducting stratigraphic studies in the Beluga and Sterling Fomrations in the Homer area of Cook Inlet.Funding for this stratigraphic work was provided by Benchmark Oil and Gas, Pioneer Natural Resources, Chevron North American Exploration and production Company, and the State of Alaska.This data set conveys information about samples collected during fieldwork in the Homer area of Cook Inlet.Samples were collected from outcrops for Mercury Injection Capillary Pressure (MICP) analyses.Analytical data from these rock samples are tabulated in this publication.
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This data release presents zircon U-Pb LA-ICP-MS geochronology from igneous rocks exposed in a coastal exposure at Ursus Head, Iliamna C-2 Quadrangle. Sills and dikes exposed in a coastal exposure at Ursus Head are deformed within the Bruin Bay fault zone. Common dikes intruding late Triassic Kamishak Formation strata composing the hanging-wall of the Bruin Bay fault are cut by numerous small-scale, low-angle, bedding-parallel, and high angle contractional faults. Sample 09MAW006A collected from one of many dikes deformed in the fault zone produced a uni-modal distribution of zircon ages of with a weighted mean of 206.92 +/-0.96 (2 sigma, n=47) and an MSWD of 1.1. Sample 09BG020C collected from a sill of more mafic...
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This data set conveys information about samples collected during fieldwork in the Tyonek area of Cook Inlet. Samples were collected from outcrops for Mercury Injection Capillary Pressure (MICP) analyses.
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Between 1979 and 1982, the Alaska Division of Geological & Geophysical Surveys (DGGS) and the Geophysical Institute, University of Alaska Fairbanks, undertook an assessment of the states geothermal resources under a program jointly sponsored by the U.S. Department of Energy and the State of Alaska. During this period, reconnaissance investigations of more than 100 thermal spring sites and fumarole fields located in Alaska were conducted by DGGS.
Tags: Active Volcanoes, Adak Hot Springs, Adak Quadrangle, Akutan, Akutan Volcano, All tags...
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This data set conveys information about samples collected during fieldwork in the Tyonek area of Cook Inlet. Samples were collected from outcrops for Mercury Injection Capillary Pressure (MICP) analyses.
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The Alaska Volcano Observatory (AVO) uses an informal set of names for about 140 'volcanoes.' Some names refer to large, complex volcanic centers, while others indicate only a specific cone. This publication expands the list of 140 named volcanoes to include all volcanic vents where magma has reached the surface over the past 2.6 million years. This database of all known (published, or unpublished with permission) Quaternary volcanic vents was developed to better describe the nature and character of Quaternary volcanism in Alaska and specifically to aid in the discussion of spatial and temporal patterns of Alaska volcanism. This list is a preliminary starting point, and we hope that it is updated and expanded by...
Tags: Adak Quadrangle, Alaska Peninsula, Aleutian Islands, Amukta Quadrangle, Atka Quadrangle, All tags...
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This map shows the subcrop pattern of the Mesozoic rock units present at the top Mesozoic unconformity (also commonly referred to as the base Tertiary unconformity) in Cook Inlet basin, Alaska. The subcrop is projected onto the top Mesozoic unconformity depth surface of Cook Inlet basin, Alaska, published by Shellenbaum and others (2010). Publicly available geologic and geophysical data from multiple sources were collected, interpreted, and integrated into the subcrop map. Formation picks at the top Mesozoic unconformity were determined for 109 wells. Mesozoic horizons from two regional marine two-dimensional (2-D) seismic datasets (approximately 3,300 miles) were interpreted. Eight map units were established for...
Tags: Anchorage, Anchorage Quadrangle, Bedrock Geologic Map, Bedrock Geology, Bibliography, All tags...
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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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The State of Alaska Division of Geological & Geophysical Surveys (DGGS) and Division of Oil & Gas (DOG) are currently engaged in a multi-year study of the hydrocarbon potential of the Tertiary and Mesozoic strata in Cook Inlet basin. Modal analyses and routine core analyses were performed on Tertiary and Mesozoic siltstones and sandstones collected during the 2007-2010 field seasons from six geographic areas in upper and lower Cook Inlet. The reservoir quality of Cook Inlet sandstones varies widely depending on their mineralogy, geologic age, burial depth, and depositional environment. Tuxedni and Naknek sandstones have poor reservoir quality and are likely to be of equally poor quality down dip. West Foreland sandstones...
Tags: Aleutian Arc, Beluga Basin, Bluff Point, Capps Glacier, Chert, All tags...
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The State of Alaska Division of Geological & Geophysical Surveys (DGGS) is currently engaged in a multi-year study of the hydrocarbon potential of the Tertiary and Mesozoic strata in Cook Inlet basin. This report summarizes mercury injection capillary pressure (MICP) data for 38 outcrop samples collected from the Tyonek, Beluga, and West Foreland Formations in the Tyonek and Talkeetna quadrangles. All samples were collected from measured stratigraphic sections. The Tyonek Formation samples have unimodal pore systems and the majority have well defined to sharp intrusion profiles. The Beluga Formation samples are characterized by unimodal pore systems and relatively broad intrusion profiles. The West Foreland Formation...
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The purpose of this study was to evaluate a potential tsunami risk for communities of Homer and Seldovia in the Kachemak Bay area, Alaska. This report provides guidance to the local emergency managers in tsunami hazard assessment. We used a numerical modeling method to estimate the extent of inundation due to tsunami waves generated by earthquake sources. Our tsunami scenarios included a repeat of the tsunami of the 1964 great Alaska earthquake, as well as a hypothetical tsunami wave generated by a local fault source. We didn't consider landslide-generated tsunamis in this study. Results of numerical modeling combined with historical observations in the region are intended to help local emergency services officials...
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This data contains the location of coal resources within the State of Alaska and created in cooperation with the Alaska Coal Association. Total hypothetical coal resources in Alaska exceed 5.5 trillion short tons, equal to about half the estimated coal resources of the United States. Major coal deposits occur in the Northern Alaska, Nenana, and Cook Inlet-Susitna provinces.
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The State of Alaska Division of Geological & Geophysical Surveys (DGGS) is currently engaged in a multi-year study of the hydrocarbon potential of the Tertiary and Mesozoic strata in Cook Inlet basin. This report summarizes mercury injection capillary pressure (MICP) data for 19 samples collected from the Indecision Creek Member of the Naknek Formation and the Kaguyak Formation type section. All samples were analyzed by PetroTech Associates, Houston, TX. PetroTech Associates found that the Kaguyak rocks were generally less porous and permeable compared to the Naknek, although there is some overlap in values. The capillary pressure data for this publication is provided in its native spreadsheet format. The manuscript...
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Research on coastal change in Cook Inlet and South East Alaska has increased rapidly in recent years, making it challenging to track existing projects, understand their cumulative insights, gauge remaining research gaps, and prioritize future work. The project proposed here will identify existing coastal change research in Cook Inlet and Southeast Alaska, and synthesize each projects focus, approach, and findings. The resulting report will document the research landscape for communities facing change, decision-makers navigating change, researchers pursuing projects, as well as funding agencies trying to prioritize where to allocate resources. This project will help the North Pacific Landscape Conservation Cooperative...
Categories: Data, Project; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: 2015, AK-0, AK-00, Academics & scientific researchers, Academics & scientific researchers, All tags...


map background search result map search result map A compilation of sulphur dioxide and carbon dioxide emission-ratedata from Cook Inlet volcanoes (Redoubt, Spurr, Illiamna, andAugustine), Alaska during the period from 1990 to 1994 Environmental Sensitivity Index, Outer Coast of Washington, 1985 Current Coastal Change Research and Priority Information Needs in Western Alaska A Guide to the Late Quaternary History of Northern and Western Kenai Peninsula, Alaska Geothermal Resources of Alaska Preliminary database of Quaternary vents in Alaska Mercury Injection Capillary Pressure results from outcrop samples in the Homer area of Cook Inlet Petrology and reservoir potential of Tertiary and Mesozoic sandstones, Cook Inlet, Alaska: A preliminary analysis of outcrop samples collected during 2007-2010 field seasons Results of mercury-injection capillary pressure tests on outrcrop samples in the Tyonek area of Cook Inlet Results of mercury-injection capillary pressure tests on outcrop samples in the Tyonek area of Cook Inlet Mercury injection capillary pressure results from outcrop samples in the Indecision Creek Member of the Naknek Formation and the Kaguyak Formation type section Mercury injection capillary pressure (MICP) results from outcrop samples in the Tyonek, Beluga, and West Foreland Formations, Tyonek and Talkeetna quadrangles, Alaska Major-oxide and trace-element geochemical data from rocks collected in 2010 in the Tyonek Quadrangle, Alaska Zircon U-Pb and 40Ar/39Ar results from dikes collected within the Bruin Bay fault zone, lower Cook Inlet Tsunami hazard maps of the Homer and Seldovia areas, Alaska Top Mesozoic unconformity depth map of the Cook Inlet Basin, Alaska Surficial geology of the Tyonek area, south-central Tyonek Quadrangle, Alaska Top Mesozoic unconformity subcrop map, Cook Inlet basin, Alaska Map of Alaska's coal resources Zircon U-Pb and 40Ar/39Ar results from dikes collected within the Bruin Bay fault zone, lower Cook Inlet Tsunami hazard maps of the Homer and Seldovia areas, Alaska Surficial geology of the Tyonek area, south-central Tyonek Quadrangle, Alaska Current Coastal Change Research and Priority Information Needs in Western Alaska Mercury injection capillary pressure (MICP) results from outcrop samples in the Tyonek, Beluga, and West Foreland Formations, Tyonek and Talkeetna quadrangles, Alaska Environmental Sensitivity Index, Outer Coast of Washington, 1985 A Guide to the Late Quaternary History of Northern and Western Kenai Peninsula, Alaska Petrology and reservoir potential of Tertiary and Mesozoic sandstones, Cook Inlet, Alaska: A preliminary analysis of outcrop samples collected during 2007-2010 field seasons A compilation of sulphur dioxide and carbon dioxide emission-ratedata from Cook Inlet volcanoes (Redoubt, Spurr, Illiamna, andAugustine), Alaska during the period from 1990 to 1994 Top Mesozoic unconformity subcrop map, Cook Inlet basin, Alaska Top Mesozoic unconformity depth map of the Cook Inlet Basin, Alaska Map of Alaska's coal resources Preliminary database of Quaternary vents in Alaska Geothermal Resources of Alaska