Glacial chronology of Mauna Kea, Hawaii, as constrained by surface- exposure dating

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Abstract

Since S.C.Porter completed his study of the glaciation of Mauna Kea, Hawaii, new surface-exposure dating techniques have been developed to estimate ages of Quaternary glacial events. Our rock varnish, cosmogenic 36Cl buildup, 14C dating of organics in silica skins, and in situ 14C results affirm Porter's glacial sequence. The Makanaka Glaciation lasted from ~40 ka to ~13 ka, but glacial retreat begun by ~18 ka was almost complete by ~15 ka. We place the Waihu Glaciation during the early Wisconsin (oxygen-isotope stage 4) based on exposure ages of ~60 to 70 ka, and the Pohakuloa Glaciation in oxygen-isotope stage 6 based on exposure ages of >132 to 163 ka. -from Authors

Original languageEnglish (US)
Title of host publicationNational Geographic Research & Exploration
Pages456-471
Number of pages16
Volume7
Edition4
StatePublished - 1991

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ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Environmental Science(all)

Cite this

Dorn, R. (1991). Glacial chronology of Mauna Kea, Hawaii, as constrained by surface- exposure dating. In National Geographic Research & Exploration (4 ed., Vol. 7, pp. 456-471)