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Upper Kuparuk River Region Surficial Geology

Surficial geology affects vegetation patterns and disturbance recovery rates. Surficial geology was grouped into the following classes for map display:

  • Glacial till deposit: Glacial till in the region was deposited during the Sagavanirktok and Itkillik glaciations (mid and late Pleistocene). Till surfaces are generally rocky and gently undulating with blockfields, and nonsorted circles. Till on most surfaces has been covered by fine-grained colluvium that has been transported from upslope.
  • Glaciofluvial deposit: Outwash deposited by meltwaters from the Pleistocene glaciers. Glaciofluvial deposits cover large areas marginal to many modern floodplains. Outwash deposits have irregular, rocky microrelief with a wide variety of landforms including kames, kame terraces, and flat terraces with high-centered polygons.
  • Other alluvial deposits: Stream deposits occur on modern and ancient floodplains, watertracks, and alluvial fans.
  • Colluvial deposit: Hillslope deposits whose origin is due primarily to downslope movement of material under the force of gravity, but often also in association with forces due to water movement. Colluvial materials often cover other deposits and bedrock.
  • Bedrock: Includes all exposed bedrock and weathered bedrock deposits. Most bedrock is a mixture of sandstone and conglomerate (Kanayute Formation).
  • Organic deposit: Organic deposits greater than 50 cm deep occur in colluvial basins and in some areas with wide watertracks.
  • Lacustrine deposit: Lake sediments occur in association with drained glacial lakes such as Galbraith Lake and along the Sagavanirktok River, and a few much smaller drained glacial kettles and ponds.
  • Eolian deposit: Windblown fine sand and silt associated with drained lakes and loess from rivers.
  • Water: Includes lakes, ponds and rivers.
  • Disturbed areas: Includes all anthropogenic disturbances, such as gravel pads, gravel mines, and airstrips.

Visit Toolik Arctic Geobotanical Atlas for details on legend units, photos of map units and plant species, glossary, bibliography and links to ground data.

Back to Upper Kuparuk River Region

Map Themes

Elevation, Glacial Geology, Hydrology, Landform, Surficial Geology, Surficial Geomorphology, Vegetation, Landsat NDVI trend 1985-2007, SPOT false-color infrared (CIR), SPOT NDVI

Data and Resources

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Status: Complete
Type: Data
Data Types: Image, GIS, Map
Primary Contact
Walker, Donald A. (Skip)
ISO Topics
geoscientificInformation, imageryBaseMapsEarthCover

Alaska, Arctic, Northslope Borough

All Maps, Upper Kuparuk River Region

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    Updated by Lisa
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  • 01c8ceef3d596f40f05bf496ca00d929
    Published by Lisa
    2015-01-13 15:48:24 -0900
  • 01c8ceef3d596f40f05bf496ca00d929
    New record created
    2015-01-13 15:48:15 -0900