| Abstract: | A series of submerged coral reefs off northwestern Hawaii was formed during (largely glacial) intervals when the rate of local sea-level rise was less than the maximum upward growth rate of the reefs. Mass-spectrometric 234U/238U ages for samples from six such reefs range from 17 to 475 ka and indicate that this part of the Hawaiian Ridge has been subsiding at a roughly uniform rate of 2.6 mm/yr for the past 475 ka. The 234U/238U ages are in general agreement with model ages of reef drowning (based on estimates of paleo-sea-level stands derived from oxygen-isotope ratios of deep-sea sediments), but there are disagreements in detail. The high attainable precision (??10 ka or better on samples younger than ~800 ka), large applicable age range, relative robustness against open-system behavior, and ease of analysis for this technique hold great promise for future applications of dating of 50-1000 ka coral. -Authors |
| Genre: | Article |
| ProdID: | 70016838 |
| Citation Author: | Ludwig, K. R.; Szabo, B. J.; Moore, J. G.; Simmons, K. R. |
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| Citation End Page: | 174 |
| Citation Issue: | 2 |
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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: | Crustal subsidence rate off Hawaii determined from 234U/238U ages of drowned coral reefs; 1991; Article; Journal; Geology; Ludwig, K. R.; Szabo, B. J.; Moore, J. G.; Simmons, K. R. |
| Citation Start Page: | 171 |
| Citation Volume: | 19 |
| Citation Year: | 1991 |
| Type: | citation/reference |
| Text: | Crustal subsidence rate off Hawaii determined from 234U/238U ages of drowned coral reefs; 1991; Article; Journal; Geology; Ludwig, K. R.; Szabo, B. J.; Moore, J. G.; Simmons, K. R. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Tue, 1 Jan 1991 00:00 -0600 |
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