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Geologic Unit: Fagasa
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Map showing publication footprint
  • Usage in publication:
    • Fagasa gabbro*
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Gabbro
  • AAPG geologic province:
    • Samoa Islands
Publication:

Daly, R.A., 1924, The geology of the American Samoa, IN A memorial to Alfred Goldsborough Mayor: Carnegie Institution of Washington Publication, no. 340, p. 93-143., Papers from the Carnegie Inst. Washington, Dept. Marine Biology, v. XIX


Summary:

Pg. 113-115. Fagasa gabbro. Elliptical body of gabbro with diameters of 100 to 200 meters. Cuts across older series of basalts.
Occurs on divide about 300 m south of Pago Pago-Fagasa trail, Samoa Islands (Tutuila).

Source: US geologic names lexicon (USGS Bull. 1200, p. 1307).


Map showing publication footprint
  • Usage in publication:
    • Fagasa gabbro*
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Samoa Islands
Publication:

Stearns, H.T., 1944, Geology of the Samoan Islands: Geological Society of America Bulletin, v. 55, no. 11, p. 1279-1332, (incl. geologic map, scale 1:60,000)


Summary:

Pg. 1296. Fagasa gabbro. Appears to be dike in Pago volcanic series (new), considered to be Pliocene or early Pleistocene(?).

Source: US geologic names lexicon (USGS Bull. 1200, p. 1307).


Map showing publication footprint
  • Usage in publication:
    • Fagasa gabbro*
  • Modifications:
    • Age modified
  • AAPG geologic province:
    • Samoa Islands
Publication:

Macdonald, G.A., and Davis, D.A., 1956, Zone des Hawaii, Chapter 2, IN Avias, Jacques, and others, Oceanie proprement dite; Fasc. 2 of V. 6, Oceanie: Lexique Stratigraphique International, p. 70-143(?)., Prepared by the Centre National de la Recherche Scientifique (Paris), International Geological Congress, Commission on Stratigraphy


Summary:

Pg. 162. [Age is] Pliocene(?).

Source: US geologic names lexicon (USGS Bull. 1200, p. 1307).


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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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