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Geologic Unit: Kittitas
Map showing publication footprint
  • Usage in publication:
    • Kittitas Drift
  • Modifications:
    • Named
  • Dominant lithology:
    • Till
    • Gravel
  • AAPG geologic province:
    • Cascades province
Publication:

Porter, S.C., 1976, Pleistocene glaciation in the southern part of the North Cascade Range, Washington: Geological Society of America Bulletin, v. 87, no. 1, p. 61-75.


Summary:

Named for Kittitas Valley, upper Yakima River drainage basin, Kittitas Co, WA. Divided into (ascending): Swauk Prairie Member (new) and Indian John Member (new). Type locality designated for each member. [Name Kittitas Drift first used by Porter (1971, 1975).] Composed of till and gravel moraines and dissected outwash fills mantled by loess. Overlies Thorp Drift (new); underlies Lakedale Drift (new). Is Pleistocene age.

Source: GNU records (USGS DDS-6; Menlo GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Kittitas Drift*
  • Modifications:
    • Geochronologic dating
    • Revised
  • AAPG geologic province:
    • Cascades province
Publication:

Waitt, R.B., Jr., 1979, Late Cenozoic deposits, landforms, stratigraphy, and tectonism in Kittitas Valley, Washington: U.S. Geological Survey Professional Paper, 1127, 18 p. [Available online from the USGS PubsWarehouse: http://pubs.er.usgs.gov/pubs/pp/pp1127]


Summary:

Swauk Prairie and overlying Indian John Members of Kittitas Drift of Porter (1975, 1976) are reinterpreted to be phases of accumulations during single glaciation. Kittitas Drift apparently represents penultimate full glaciation of marine isotope record 0.14 to 0.13 Ma (Emiliani and Shackleton, 1974; Hays and others, 1976)

Source: GNU records (USGS DDS-6; Menlo GNULEX).


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates published by U.S. Geological Survey authors.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).

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