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Geologic Unit: Maunawili
Map showing publication footprint
  • Usage in publication:
    • Maunawili volcanics*
  • Modifications:
    • Named
  • Dominant lithology:
    • Basalt
  • AAPG geologic province:
    • Oahu
Publication:

Stearns, H.T., 1935, Geography and geology, [Island of Oahu, Hawaii], Part 1, IN Stearns, H.T., and Vaksvik, K.N., Geology and ground-water resources of the Island of Oahu, Hawaii: Hawaii Division of Hydrography Bulletin, no. 1, p. 3-198.


Summary:

Named for occurrence at Maunawili Ranch, 2 mi W of Waimanalo, along Makawao Stream [Koko Head 7.5' quad] Island of Oahu. Included as unit in middle part of Honolulu volcanic series. Consists of deeply weathered cone and flow about 100 ft thick of nepheline basalt. Unconformably overlies Koolau volcanic series. Tentatively assigned to Waipio stand of sea based on weathering, "though it may have erupted at any time during the recession of the sea from the Kaena to the Waipio level." Assigned middle(?) and late Pleistocene age.

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


Map showing publication footprint
  • Usage in publication:
    • Maunawili volcanics*
  • Modifications:
    • Age modified
  • AAPG geologic province:
    • Oahu
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:

Exposed over area about 0.3 sq mi on northeastern side of Koolau Range, 7.5 mi northwest of Makapuu Head. No fossils. Believed to have erupted during minus 60-ft (Waipio) stand of sea or during recession of sea from plus 95-ft (Kaena) stand to Waipio stand. Assigned late Pleistocene age.

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


Map showing publication footprint
  • Usage in publication:
    • Maunawili Volcanics†
  • Modifications:
    • Abandoned
  • AAPG geologic province:
    • Oahu
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:

Maunawili Volcanics (Stearns, IN Stearns and Vaksvik, 1935) abandoned as formally named unit and called Maunawili flow (and associated cone), informal unit of Honolulu Volcanics.

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


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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