Named after village of Honolua [21 deg 00' 59"N, 156 deg 38' 26"W, Honolua 7.5' quad] on northwest coast of east Maui. Consists of lava flows of massive soda trachyte and thinner oligoclase light-colored andesite, bulbous domes, cones, and dikes. Is up to 750 ft thick near Eke but averages 75 ft. Overlies lateritic, buff-to-ochre soils which in turn overlie dark-red and red-brown soils of Wailuku volcanic series (new). Separated from younger Lahaina volcanic series (new) by erosional unconformity. Stratigraphic section shows late Pliocene(?) or early Pleistocene age but map shows probable Pliocene and early and middle Pleistocene age.
Source: GNU records (USGS DDS-6; Menlo GNULEX).
Type locality: village of Honolua [21 deg 00' 59"N, 156 deg 38' 26"W, Honolua 7.5' quad] on northwest coast of Island of Maui. Lavas cap some of ridges on all flanks of west Maui Mountains. Underlies soil up to 5 ft thick. Assigned late Pliocene(?) or early Pleistocene age "based on degree of weathering and erosion and relationship to Pleistocene fossiliferous beach conglomerates which rest on them locally between Lahaina and Olowalu."
Source: GNU records (USGS DDS-6; Menlo GNULEX).
K-Ar ages on trachyte (collected near Kahakuloa and Puu Launiupoko) and mugearite (collected from flow northwest of Honolua and roadcut at McGregor Point) from Honolua volcanic series range from 1.17 to 1.15 Ma. "All the lavas dated from Maui are latest Pliocene to Pleistocene."
Source: GNU records (USGS DDS-6; Menlo GNULEX).
Detailed map (plate 6) shows occurrence of unit in north area of West Maui.
Source: GNU records (USGS DDS-6; Menlo GNULEX).
K-Ar age on trachyte (from west slope of Launiupoko Hill) of Honolua Volcanic Series is 1.5 +/-0.13 Ma.
Source: GNU records (USGS DDS-6; Menlo GNULEX).
Honolua Volcanic Series (Stearns and Macdonald, 1942) reduced in rank and renamed Honolua Formation following usage of Macdonald, 1978. "No systematic attempt is being made to revise volcanic stratigraphic nomenclature in Hawaii."
Source: GNU records (USGS DDS-6; Menlo GNULEX).
Honolua Volcanic Series of Stearns and Macdonald (1942) reduced in rank and renamed Honolua Volcanics. Assigned Pleistocene age based on isotopic determinations (McDougall, 1964; Naughton and others, 1980).
Source: GNU records (USGS DDS-6; Menlo GNULEX).
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
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