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DOI	10.1016/j.quascirev.2020.106571
	Correcting MIS5e and 5a sea-level estimates for tectonic uplift; an example from southern California
	Simms A.R.; Rood D.H.; Rockwell T.K.
发表日期	2020
ISSN	0277-3791
卷号	248
英文摘要	Along tectonically active margins, the difference in elevations between global sea levels during highstands and uplifted marine terraces is a function of both tectonics and glacial-isostatic adjustment (GIA). However, disentangling the relative influence of these two processes remains a challenge for those trying to gain insights into either process. In this study, we outline a strategy for isolating the tectonic contribution to marine isotope stage (MIS) 5e and 5a marine terrace elevations for the southern California coast by determining the cosmogenic radionuclide burial age and elevation of the early Pleistocene (1.48 ± 0.17 Ma) Clairemont Terrace in San Diego. Using this older terrace as a datum for calculating tectonic uplift rate provides a much longer time period to average out uncertainties in past local or relative sea levels (RSL) that arise from ambiguities in GIA parameters and global meltwater volumes. The assumption of constant uplift rates is warranted for this portion of the California coast given its relatively simple tectonic setting on the rift flank of the Salton Trough. From this approach, we determine an average uplift rate of 0.066 ± 0.020 mm/yr or 0.055 ± 0.013 mm/yr, depending on the RSL model used for the time of the Clairemont Terrace formation, for much of the San Diego coastline. Correcting for this tectonic uplift rate leaves an estimate of 15.1 + 2.6/-3.1 m (16.4 + 1.9/-2.6 m) and 4.8 ± 1.9 m (5.6 ± 1.5 m) for RSL during MIS5e and MIS5a, respectively. These new estimates of MIS5e and MIS5a sea levels along the southern California coast provide important constraints on GIA parameters and former ocean and ice volumes. © 2020 Elsevier Ltd
英文关键词	Calabrian; Coastal geomorphology; Cosmogenic isotopes; Interglacials; Last Interglacial; Sea-level changes
语种	英语
scopus关键词	Glacial geology; Sea level; Cosmogenic radionuclides; Early pleistocene; Glacial isostatic adjustment; Marine isotope stages; Relative sea level; Southern California; Tectonic settings; Terrace formations; Tectonics; correction; cosmogenic radionuclide; marine isotope stage; Pleistocene; radionuclide; sea level; sea level change; uplift; California; Salton Trough; San Diego; United States
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151290
作者单位	Department of Earth Science, University of California Santa Barbara, Santa Barbara, CA 93111, United States; Department of Earth Science and Engineering, Royal School of Mines, Imperial College London, SW7 2AZ, United Kingdom; Department of Geological Sciences, San Diego State University, San Diego, CA 92182, United States
推荐引用方式 GB/T 7714	Simms A.R.,Rood D.H.,Rockwell T.K.. Correcting MIS5e and 5a sea-level estimates for tectonic uplift; an example from southern California[J],2020,248.
APA	Simms A.R.,Rood D.H.,&Rockwell T.K..(2020).Correcting MIS5e and 5a sea-level estimates for tectonic uplift; an example from southern California.Quaternary Science Reviews,248.
MLA	Simms A.R.,et al."Correcting MIS5e and 5a sea-level estimates for tectonic uplift; an example from southern California".Quaternary Science Reviews 248(2020).