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Map showing publication footprint
  • Usage in publication:
    • Olalla Creek Member
  • Modifications:
    • Named
  • Dominant lithology:
    • Conglomerate
    • Sandstone
  • AAPG geologic province:
    • Oregon-Washington Coast Ranges province
    • Klamath Mountains province
Publication:

Baldwin, E.M., 1974, Eocene stratigraphy of southwestern Oregon: Oregon Department of Geology and Mineral Industries Bulletin, no. 83, 40 p., (incl. geologic map, scale 1:250,000)


Summary:

Olalla Creek Member is named as the uppermost member (of 3) of the Lookingglass Formation (new) is named for Olalla Creek, Douglas Co., OR. Type section not evaluated to date. May be seen in center of syncline along Olalla Creek and intermittently southwest of Tenmile Butte to Buck Springs, to Live Oak Mountain, and on to Dutchman Butte, and Chipmunk Ridge to Twelvemile Creek. Composed of conglomerate and sandstone similar to that of the Bushnell Rock Member (new) of the Lookingglass Formation. Is about 1000 ft thick. Overlies the Tenmile Member (new) of the Lookingglass Formation. Unconformably underlies the Flournoy Formation (new). Age is early and middle Eocene based on age of the Lookingglass Formation.

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


Map showing publication footprint
  • Usage in publication:
    • Olalla Creek Member
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Oregon-Washington Coast Ranges province
    • Klamath Mountains province
Publication:

Thoms, R.E., 1975, Biostratigraphy of the Umpqua Group, southwestern Oregon, IN Weaver, D.W., Hornaday, G.R., and Tipton, Ann, eds., Paleogene symposium and selected technical papers [proceedings]; conference on future energy horizons of the Pacific Coast: American Association of Petroleum Geologists, Pacific Section, 50th joint annual meeting of Pacific Sections of American Association of Petroleum Geologists, Society of Economic Paleontologists and Mineralogists, and Society of Exploration Geophysicists, Long Beach, CA, April 23-26, 1975, v. 50, p. 513-562.


Summary:

Olalla Creek Member of the Lookingglass Formation of Baldwin (1974) is included in the Umpqua Group.

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


Map showing publication footprint
  • Usage in publication:
    • Olalla Creek Member
  • Modifications:
    • Not used
  • AAPG geologic province:
    • Klamath Mountains province
    • Oregon-Washington Coast Ranges province
Publication:

Molenaar, C.M., 1985, Depositional relations of Umpqua and Tyee Formations (Eocene) southwestern Oregon: American Association of Petroleum Geologists Bulletin, v. 69, no. 8, p. 1217-1229. [Available online, with subscription, from AAPG archives: http://www.aapg.org/datasystems or http://search.datapages.com]


Summary:

Olalla Creek Member of the Lookingglass Formation of Baldwin (1974) assigned to the White Tail Ridge Member of the Umpqua Formation. Interpreted to be more landward facies of the White Tail Ridge Member [members of the Umpqua Formation are not adopted in this paper; Lookingglass Formation is not recognized].

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


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