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National Geologic Map Database
Geologic Unit: Ferndale
  • Usage in publication:
    • Ferndale sandstone
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Sandstone
    • Shale
  • AAPG geologic province:
    • Eel River basin
Publication:

MacGinitie, H.D., 1943, Central and southern Humboldt County [California]: California Division of Mines Bulletin, no. 118, pt. 3, p. 633-635.


Summary:

Pg. 633. Ferndale sandstone. Fine-grained gray sandstone with thin interbeds of clay shale. Thickness about 2,500 feet. Underlies Wildcat formation; overlies Pico formation. Age is late Pliocene.
[Occurs in central and southern Humboldt Co., northwestern CA.]

Source: US geologic names lexicon (USGS Bull. 1200, p. 1339).


Map showing publication footprint
  • Usage in publication:
    • Ferndale sandstone†
  • Modifications:
    • Abandoned
  • AAPG geologic province:
    • Eel River basin
Publication:

Ogle, B.A., 1953, Geology of the Eel River Valley area, Humboldt County, California: California Division of Mines Bulletin, no. 164, 128 p., (incl. geologic map)


Summary:

Pg. 33. Name Ferndale sandstone abandoned. Unit redefined as [Scotia] Bluffs sandstone (new) of Wildcat group. [See also entry under Scotia Bluffs.]
[Typographical error (US geologic names lexicon, USGS Bull. 1200, p. 1339): Ferndale is replaced with Scotia Bluffs, not Scotit Bluffs.]

Source: Publication; US geologic names lexicon (USGS Bull. 1200, p. 1339).


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 ([ ]).