Submersible observations and samples show that the lower south flank of Hawaii, offshore from Kilauea volcano and the active Hilina slump system, consists entirely of compositionally diverse volcaniclastic rocks; pillow lavas are confined to shallow slopes. Submarine-erupted basalt clasts have strongly variable alkalic and transitional basalt compositions (to 41% SiO2, 10.8% alkalies), contrasting with present-day Kilauea tholeiites. The volcaniclastic rocks provide a unique record of ancestral alkalic growth of an archetypal hotspot volcano, including transition to its tholeiitic shield stage, and associated slope-failure events.
Citation Information
Publication Year | 2000 |
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Title | In search of ancestral Kilauea volcano |
DOI | 10.1130/0091-7613(2000)28<1079:ISOAKV>2.0.CO;2 |
Authors | P. W. Lipman, T. W. Sisson, T. Ui, J. Naka |
Publication Type | Article |
Publication Subtype | Journal Article |
Series Title | Geology |
Index ID | 70022059 |
Record Source | USGS Publications Warehouse |