| Abstract: | A sequence of submerged terraces (L1-L12) offshore Lanai was previously interpreted as reefal, and correlated with a similar series of reef terraces offshore Hawaii island, whose ages are known to be < 500 ka. We present bathymetric, observational, lithologic and 51 87Sr/86Sr isotopic measurements for the submerged Lanai terraces ranging from - 300 to - 1000 m (L3-L12) that indicate that these terraces are drowned reef systems that grew in shallow coral reef to intermediate and deeper fore-reef slope settings since the early Pleistocene. Age estimates based on 87Sr/86Sr isotopic measurements on corals, coralline algae, echinoids, and bulk sediments, although lacking the precision (??? ?? 0.23 Ma) to distinguish the age-depth relationship and drowning times of individual reefs, indicate that the L12-L3 reefs range in age from ??? 1.3-0.5 Ma and are therefore about 0.5-0.8 Ma older than the corresponding reefs around the flanks of Hawaii. These new age data, despite their lack of precision and the influence of later-stage submarine diagenesis on some analyzed corals, clearly revise the previous correlations between the reefs off Lanai and Hawaii. Soon after the end of major shield building (??? 1.3-1.2 Ma), the Lanai reefs initiated growth and went through a period of rapid subsidence and reef drowning associated with glacial/interglacial cycles similar to that experienced by the Hawaii reefs. However, their early Pleistocene initiation means they experienced a longer, more complex growth history than their Hawaii counterparts. ?? 2009 Elsevier B.V. |
| Genre: | Article |
| ProdID: | 70034182 |
| Citation Author: | Webster, J. M.; Clague, D. A.; Faichney, I. D. E.; Fullagar, P. D.; Hein, J. R.; Moore, J. G.; Paull, C. K. |
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| Citation End Page: | 339 |
| Citation Issue: | 3-4 |
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| Citation Language: | English |
| Citation Larger Work Title: | Earth and Planetary Science Letters |
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| Citation Number Of Pages: | 9 |
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| Citation Search Results Text: | Early Pleistocene origin of reefs around Lanai, Hawaii; 2010; Article; Journal; Earth and Planetary Science Letters; Webster, J. M.; Clague, D. A.; Faichney, I. D. E.; Fullagar, P. D.; Hein, J. R.; Moore, J. G.; Paull, C. K. |
| Citation Start Page: | 331 |
| Citation Volume: | 290 |
| Citation Year: | 2010 |
| Type: | citation/reference |
| Text: | Early Pleistocene origin of reefs around Lanai, Hawaii; 2010; Article; Journal; Earth and Planetary Science Letters; Webster, J. M.; Clague, D. A.; Faichney, I. D. E.; Fullagar, P. D.; Hein, J. R.; Moore, J. G.; Paull, C. K. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1016/j.epsl.2009.12.029 |
| Date Other: | Fri, 1 Jan 2010 00:00 -0600 |
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