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Map showing publication footprint
  • Usage in publication:
    • Montgomery Creek formation
  • Modifications:
    • Named
  • Dominant lithology:
    • Sand
    • Gravel
  • AAPG geologic province:
    • Sacramento basin
Publication:

Williams, Howel, 1932, Geology of the Lassen Volcanic National Park, California: University of California Publications in Geological Sciences, v. 21, no. 8, p. 195-385, (incl. geologic map, scale 1:48,000)


Summary:

Occurs in area to west of Lassen, northern CA. Name credited to R.D. Russell who provisionally assigned deposits to the Eocene. Rocks had been classed with the "Ione" formation as Miocene in age. Montgomery Creek formation consists of series of fresh-water sands and gravels containing an abundance of andesitic detritus. Overlies Chico formation. Russell also suggested that Susanville gravels, southeast of Lassen may be tentatively correlated with Montgomery Creek formation.

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


Map showing publication footprint
  • Usage in publication:
    • Montgomery Creek formation
  • Modifications:
    • Biostratigraphic dating
  • AAPG geologic province:
    • Sacramento basin
Publication:

Anderson, C.A., and Russell, R.D., 1939, Tertiary formations of northern Sacramento Valley, California: California Journal of Mines and Geology, v. 35, no. 3, p. 219-253, (incl. geologic map, scale approx. 1:63,360)


Summary:

Type locality designated on north side of Montgomery Creek, 2.5 mi east-northeast of village of same name [Montgomery Creek 15' quad, Shasta co, CA]. Most northerly outcrop is at head of Kosk Creek; most southerly is on ridge north of Battle Creek. Consists of series of sandstones, conglomerates, and shales, with interbedded coal seams. Is entirely distinct from Ione formation. Is 1000 ft thick at head of Kosk Creek (Diller, 1906). Unconformably overlies Chico formation and underlies later volcanic rocks. Fossil leaves collected from several localities were pronounced Eocene age by R.W. Chaney.

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


Map showing publication footprint
  • Usage in publication:
    • Montgomery Creek Formation*
  • Modifications:
    • Adopted
    • Age modified
  • AAPG geologic province:
    • Sacramento basin
Publication:

Macdonald, G.A., 1966, Geology of the Cascade Range and Modoc Plateau, IN Bailey, E.H., ed., Geology of northern California: California Division of Mines and Geology Bulletin, no. 190, p. 65-96.


Summary:

Montgomery Creek Formation of Williams (1932) and Anderson and Russell (1939) is adopted. Originally included by Diller (1906) in his Ione Formation. Recognized on east side of Sacramento Valley in Shasta Co near Shingletown northward about 50 mi to upper Kosk Creek. Age is late Eocene.

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


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

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