Surficial geology of the Tyonek area, south-central Tyonek Quadrangle, Alaska

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 and debris avalanches, the Kaloa deposits in northwestern Cook Inlet, Lake Clark fault, and holocene flooding in the Beluga, Chichantna, Chakachatna, and McArthur river drainages.

Data and Resources

Field Value
access_constraints ["Use Constraints: Any hard copies or published datasets utilizing these datasets shall clearly indicate their source. If the user has modified the data in any way, the user is obligated to describe the types of modifications the user has made. The user specifically agrees not to misrepresent these datasets, nor to imply that changes made by the user were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. The State of Alaska makes no express or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.", "Access Constraints: This report, map, and/or dataset is available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below)."]
bbox-east-long -151.104705
bbox-north-lat 61.350861
bbox-south-lat 60.989379
bbox-west-long -152.217924
contact-email dggsgis@alaska.gov
coupled-resource []
dataset-reference-date [{"type": "publication", "value": "2015-01-01"}]
frequency-of-update notPlanned
licence ["The State of Alaska makes no expressed or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product."]
metadata-date 2015-10-05
metadata-language eng; USA
metadata_type geospatial
progress completed
resource-type dataset
responsible-party [{"name": "Alaska Division of Geological & Geophysical Surveys", "roles": ["pointOfContact"]}]
spatial {"type": "Polygon", "coordinates": [[[-152.217924, 60.989379], [-151.104705, 60.989379], [-151.104705, 61.350861], [-152.217924, 61.350861], [-152.217924, 60.989379]]]}
spatial_harvester true
temporal-extent-begin 2007-01-01
temporal-extent-end 2015-01-01
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • alaska-earthquake-1964
  • alluvial-fan
  • amerigeo
  • amerigeoss
  • beluga-plateau
  • beluga-river
  • blockade-glacier
  • bootlegger-cove-formation
  • capps-glacier
  • castle-mountain-fault
  • chakachatna-mcarthur-embayment
  • chakachatna-river
  • chalcedony
  • chigmit-mountains
  • chuitna-coal-project
  • chuitna-river
  • ckan
  • coastal-plain
  • colluvium
  • cook-inlet
  • cook-inlet-basin
  • correlation
  • debris-avalanche
  • depositional-environment
  • diamictons
  • earthquake-related-slope-failure
  • erratics
  • fault-displacement
  • geo
  • geoss
  • glacial-geology
  • glacier-outburst-flood
  • glacioestuarine-deposits
  • holocene
  • jasper
  • jokulhlaup
  • kaloa-deposits
  • lahar
  • lake-clark-fault
  • landslide-deposit
  • little-ice-age
  • moraines
  • mount-spurr
  • naptowne-glaciation
  • national
  • neacola-mountains
  • neoglacial
  • neotectonics
  • north-america
  • penultimate-glaciation
  • pleistocene
  • quaternary
  • radiocarbon-ages
  • rotational-landslide
  • sediment-gravity-flow
  • statemap-project
  • straight-creek
  • surface-fault-rupture
  • surficial-deposits
  • surficial-geologic-map
  • surficial-geology
  • susitna-lowland
  • tectonics
  • tertiary
  • threemile-creek
  • till
  • tordrillo-mountains
  • tyonek
  • tyonek-formation
  • tyonek-quadrangle
  • united-states
  • volcaniclastic-deposits
  • west-foreland-formation
isopen False
metadata_created 2025-11-22T19:11:29.047872
metadata_modified 2025-11-22T19:11:29.047876
notes 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 and debris avalanches, the Kaloa deposits in northwestern Cook Inlet, Lake Clark fault, and holocene flooding in the Beluga, Chichantna, Chakachatna, and McArthur river drainages.
num_resources 4
num_tags 73
title Surficial geology of the Tyonek area, south-central Tyonek Quadrangle, Alaska