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Geologic Unit: Piinaau
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Map showing publication footprint
  • Usage in publication:
    • Piinaau basalt*
  • Modifications:
    • Named
  • Dominant lithology:
    • Basalt
  • AAPG geologic province:
    • Maui
Publication:

Stearns, H.T., and Macdonald, G.A., 1942, Geology and ground-water resources of the Island of Maui, Hawaii: Hawaii Division of Hydrography Bulletin, no. 7, 344 p., (incl. geologic map, scale 1:62,500)


Summary:

Named after Piinaau Stream, Keanae Valley, eastern Maui, HI. Included as unit of Hana volcanic series. Lava flow followed gulch cut into older alluvium along western wall of Keanae Valley. Composed of dark-gray basalt with no visible phenocrysts. Underlies Keanae basalt (new); overlies Pauwalu basalt (new) both units of Hana volcanic series. Unconformably overlies Honomanu volcanic series. Map shows middle(?) and late Pleistocene and Recent [Holocene] age.

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


Map showing publication footprint
  • Usage in publication:
    • Piinaau basalt*
  • Modifications:
    • Age modified
  • AAPG geologic province:
    • Maui
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:

Type locality: Piinaau Stream near mouth of Keanae Valley, N part of Island of Maui. Is few tens of ft thick. Overlies older alluvium; underlies Keanae basalt of Hana volcanic series. Assigned Pleistocene(?) age.

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


Map showing publication footprint
  • Usage in publication:
    • Piinaau Basalt†
  • Modifications:
    • Abandoned
  • AAPG geologic province:
    • Maui
Publication:

Langenheim, V.A.M., and Clague, D.A., 1987, Stratigraphic framework of volcanic rocks of the Hawaiian Islands, Part II, IN The Hawaiian-Emperor volcanic chain, Chapter 1, OF Decker, R.W., Wright, T.L., and Stauffer, P.H., eds., Volcanism in Hawaii: U.S. Geological Survey Professional Paper, v. 1, 1350, p. 55-84. [http://ngmdb.usgs.gov/Prodesc/proddesc_42485.htm]


Summary:

Piinaau Basalt of Stearns and Macdonald (1942) abandoned as formally named unit and called Piinaau flow, an informal unit of Hana Volcanics. Hana Volcanics assigned Pleistocene(?) and Holocene age.

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


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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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