Journal
EARTH AND PLANETARY SCIENCE LETTERS
Volume 387, Issue -, Pages 27-33Publisher
ELSEVIER
DOI: 10.1016/j.epsl.2013.10.030
Keywords
Mid-Pliocene sea level; Australia; Republic of South Africa; southeast coast USA; dynamic topography; isostasy
Categories
Funding
- NSF [OCE-1202632]
- INQUA [1203]
- Harvard University
- Canadian Institute for Advanced Research
- Division Of Earth Sciences
- Directorate For Geosciences [1023724] Funding Source: National Science Foundation
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Determining eustatic sea level during the Mid-Pliocene warm period (similar to 3.3 to 2.9 Ma) has been a central but elusive goal in the study of past warm climates. Estimates of eustatic sea level based on geologic data span a broad range; variation that we now recognize is due in part to geographically varying post-depositional displacement caused by glacial isostatic adjustment and dynamic topography. In this study, we combine field observations and glacial isostatic adjustment modeling to estimate the dynamic topography signal in three areas that are important to paleo-sea level studies of the Mid-Pliocene warm period (South Africa, West Australia and southeastern United States). We show that dynamic topography played a significant role in the post-depositional displacement of Pliocene, and even younger Pleistocene, shorelines. In this regard, we provide a robust paleo-sea level elevation data set, corrected for glacial isostatic adjustment, that can be used to evaluate predictions from mantle flow models of dynamic topography. (C) 2013 Elsevier B.V. All rights reserved.
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