| Abstract: | Several young lava fields were imaged by GLORIA sidescan sonar along the Hawaiian Arch south of Hawaii. The largest, 35 by 50 km across, includes a central area characterized by high sonar backscatter and composed of several flow lobes radiating from a vent area. Reflection profiling and sea-floor photography indicate that the central lobes are flat sheet flows bounded by pillowed margins; thin surface sediment and thin palagonite rinds on lava surfaces suggest ages of 1-10 ka. Vents are localized along the arch crest near bases of Cretaceous seamounts. Two dredged flows are basanite and alkalic basalt, broadly similar to rejuvenated-stage and some pre-shield alkalic lavas on the Hawaiian Ridge. Arch volcanism represents peripheral leakage of melt from the Hawaiian hot spot over much larger areas than previously recognized. -Authors |
| Genre: | Article |
| ProdID: | 70015789 |
| Citation Author: | Lipman, P. W.; Clague, D. A.; Moore, J. G.; Holcomb, R. T. |
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| Citation End Page: | 614 |
| Citation Issue: | 7 |
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| Citation Language: | English |
| Citation Larger Work Title: | Geology |
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| Citation Number Of Pages: | 4 |
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| Citation Search Results Text: | South Arch volcanic field<>9d\newly identified young lava flows on the sea floor south of the Hawaiian Ridge; 1989; Article; Journal; Geology; Lipman, P. W.; Clague, D. A.; Moore, J. G.; Holcomb, R. T. |
| Citation Start Page: | 611 |
| Citation Volume: | 17 |
| Citation Year: | 1989 |
| Type: | citation/reference |
| Text: | South Arch volcanic field<>9d\newly identified young lava flows on the sea floor south of the Hawaiian Ridge; 1989; Article; Journal; Geology; Lipman, P. W.; Clague, D. A.; Moore, J. G.; Holcomb, R. T. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Sun, 1 Jan 1989 00:00 -0600 |
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