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Geologic Unit: Pololu
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Map showing publication footprint
  • Usage in publication:
    • Pololu volcanic series*
  • Modifications:
    • Named
  • Dominant lithology:
    • Basalt
  • AAPG geologic province:
    • Hawaii
Publication:

Stearns, H.T., and Macdonald, G.A., 1946, Geology and ground-water resources of the Island of Hawaii: Hawaii Division of Hydrography Bulletin, no. 9, 363 p., (incl. geologic map, scale 1:125,000)


Summary:

Named for Pololu Valley 5 mi southeast of Hawi. Type section in northwest wall at end of road near coast [20 deg 12' 25"N, 155 deg 44' 01"W, Honokane 7.5' quad] Kohala Mtn, Island of Hawaii. Consists of 450 ft (at type) of thin-bedded highly vesicular aa and pahoehoe basalts, basaltic dikes, and cinder and spatter cones. Measured section on southeast wall of Waipo Valley is 891 ft. Stratigraphic chart lists maximum exposed thickness as 4000+ ft. Underlies with erosional unconformity and locally conformably Hawi volcanic series (new). Assigned Pliocene and older age.

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


Map showing publication footprint
  • Usage in publication:
    • Pololu volcanic series*
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Hawaii
Publication:

Macdonald, G.A., 1949, Petrography of the Island of Hawaii, IN Shorter contributions to general geology, 1947-1949: U.S. Geological Survey Professional Paper, 214-D, p. D51-D96. [Available online from the USGS PubsWarehouse: http://pubs.er.usgs.gov/pubs/pp/pp214D]


Summary:

Lavas are nearly all olivine basalt.

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


Map showing publication footprint
  • Usage in publication:
    • Pololu volcanic series*
  • Modifications:
    • Age modified
  • AAPG geologic province:
    • Hawaii
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 is northwest wall of Pololu Valley, Island of Hawaii, HI. Comprises lower slopes of much of Kohala Mountain at north end of island. Is Pliocene(?) age.

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


Map showing publication footprint
  • Usage in publication:
    • Pololu volcanic series*
  • Modifications:
    • Geochronologic dating
  • AAPG geologic province:
    • Hawaii
Publication:

McDougall, Ian, 1964, Potassium-argon ages from lavas of the Hawaiian Islands: Geological Society of America Bulletin, v. 75, no. 2, p. 107-128.


Summary:

Estimated K-Ar age on tholeiitic basalt sample from Pololu volcanic series at Waipo Canyon gives not more than 800,000 yr B.P.

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


Map showing publication footprint
  • Usage in publication:
    • Pololu volcanic series*
  • Modifications:
    • Paleomagnetics
  • AAPG geologic province:
    • Hawaii
Publication:

Doell, R.R., and Cox, Allan, 1965, Paleomagnetism of Hawaiian lava flows: Journal of Geophysical Research, B, Solid Earth and Planets, v. 70, no. 14, p. 3377-3405., See also Nature, v. 192, no. 4803, p. 645-646, 1961


Summary:

"Paleomagnetic studies ... (1) All lavas now exposed on the Island [Hawaii] are less than 1 million years old (Pleistocene)." Samples from 138 m of lowest portion of measured section on southeast wall of Waipo Canyon were analyzed.

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


Map showing publication footprint
  • Usage in publication:
    • Pololu Volcanic Series*
  • Modifications:
    • Geochronologic dating
  • AAPG geologic province:
    • Hawaii
Publication:

Dalrymple, G.B., 1971, Potassium-argon ages from the Polulu volcanic series, Kohala Volcano, Hawaii, IN Note and Discussion: Geological Society of America Bulletin, v. 82, no. 7, p. 1997-2000.


Summary:

K-Ar ages on tholeiitic samples from 5 lava flows of Pololu Volcanic Series from lowest part of section in Waipo Canyon yielded about 0.7 +/-0.15 Ma.

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


Map showing publication footprint
  • Usage in publication:
    • Pololu Volcanic Series*
  • Modifications:
    • Geochronologic dating
  • AAPG geologic province:
    • Hawaii
Publication:

McDougall, Ian, and Swanson, D.A., 1972, Potassium-argon ages of lavas from the Hawi and Polulu volcanic series, Kohala Volcano, Hawaii: Geological Society of America Bulletin, v. 83, no. 12, p. 3731-3738.


Summary:

K-Ar ages on 9 tholeiitic samples of Pololu Volcanic Series from Waipo and Pololu Valleys, roadcuts in Mahukona and Hawi yielded 0.447 +/-0.027 to 0.327 +/-0.045 Ma.

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


Map showing publication footprint
  • Usage in publication:
    • Pololu Formation
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Hawaii
Publication:

Easton, R.M., and Easton, E.G., 1983, Geology of the Hawaiian Islands; Hawaii, Maui and Oahu; Trip 16, IN Preto, Vic, chairperson, Joint annual meeting of Geological Association of Canada, Mineralogical Association of Canada, and Canadian Geophysical Union; Volume 2, Trips 9 to 16: Geological Association of Canada, Victoria Section, Field Trip Guidebook, 91 p.


Summary:

Name changed from Pololu Volcanic Series (Stearns and Macdonald, 1946) to Pololu Formation to conform with Code of Stratigraphic Nomenclature (Henderson and others, 1980).

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


Map showing publication footprint
  • Usage in publication:
    • Pololu Basalt*
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Hawaii
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:

Pololu Volcanic Series (Stearns and Macdonald, 1946) renamed Pololu Basalt to indicate lithology. Is Pleistocene age on basis of K-Ar determinations (McDougall and Swanson, 1972).

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


Map showing publication footprint
  • Usage in publication:
    • Pololu Volcanics*
  • Modifications:
    • Redescribed
  • AAPG geologic province:
    • Hawaii
Publication:

Wolfe, E.W. (compiler), and Morris, Jean (compiler), 1996, Geologic map of the island of Hawaii: U.S. Geological Survey Miscellaneous Investigations Series Map, I-2524-A, 3 sheets, 18 p., scale 1:100,000


Summary:

Pololu Basalt is redescribed as the Pololu Volcanics to better indicate its heterogeneous lithologies (basaltic and mugearite lavas). Age is Pleistocene.

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


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