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Geologic Unit: Hanawi
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Map showing publication footprint
  • Usage in publication:
    • Hanawi basaltic andesite*
  • Modifications:
    • Named
  • Dominant lithology:
    • Andesite
  • 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 for] Hanawi Gulch where forms single narrow band of aa, Nahiku area, eastern Maui. Is unit of Hana Volcanic series. Platy jointing (where present) exposes tabular feldspar microlites; contains some small phenocrysts of olivine about 1 mm across. At highway is 30 ft thick but base is not exposed. At Big Spring is about 100 ft thick. Overlies with erosional unconformity Waiaaka lavas and Makapipi basalts. Although relative ages for Hanawi, Kuhiwa, and Paakea lavas cannot be determined, they are regarded as approx. contemporaneous. Map shows middle(?) and late Pleistocene and Recent age.

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


Map showing publication footprint
  • Usage in publication:
    • Hanawi basaltic andesite*
  • 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: Hanawi Gulch at highway [20 deg 49' 42"N, 156 deg 07' 00"W, Nahiku 7.5' quad] Nahiku area, Haleakala Volcano, northeast side of Island of Maui HI. Completely filled valley south of Koolau ditch but only partly filled it farther north where valley was deeper. Assigned Pleistocene(?) age [no basis given].

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


Map showing publication footprint
  • Usage in publication:
    • Hanawi Basaltic Andesite†
  • 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:

Hanawi Basaltic Andesite of Stearns and Macdonald (1942) abandoned as formally named unit and called Hanawi flow 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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