Geology of the Salt Lake Area, Oahu, Hawaii

Date
1972-04
Authors
Pankiwskyj, Kost A.
Contributor
Advisor
Department
Instructor
Depositor
Speaker
Researcher
Consultant
Interviewer
Journal Title
Journal ISSN
Volume Title
Publisher
University of Hawai'i Press
Volume
Number/Issue
Starting Page
Ending Page
Alternative Title
Abstract
ABSTRACT: A series of pyroclastic eruptions and one lava flow, all of melilitenephelinite composition, were produced in the environs of present-day Salt Lake, Oahu, Hawaii, beginning about 500,000 years ago and terminating more than 100,000 years ago. The age of the flow has been dated by a K40/ A40 method at 400,000 years to 470,000 years. The earliest eruptions took place at a time of higher sea levels than at present, and their products are water-laid. Later eruptions, including the major ones from Salt Lake Crater and Makalapa Crater, took place at a time of lower sea levels than at present, and their products are air-laid. Sufficient time elapsed between individual eruptions to allow for erosion of portions of the earlier cones, to deposit silt and gravel, or to develop a soil prior to a subsequent eruption. The pyroclastics are medium- to fine-grained, lithic-vitric tuffs and contain, in addition to juvenile material, a considerable quantity of particles of older rocks-volcanic and sedimentary, as well as ultramafic. The youngest deposits of tuff are unconformably truncated by reef and limestone which have been correlated with rocks dated by a Th23o/UZ38 method at 90,000 to 140,000 years.
Description
Keywords
Citation
Pankiwskyj KA. 1972. Geology of the Salt Lake area, Oahu, Hawaii. Pac Sci 26(2): 242-253.
Extent
Format
Geographic Location
Time Period
Related To
Rights
Rights Holder
Email libraryada-l@lists.hawaii.edu if you need this content in ADA-compliant format.