Early Holocene coral-based sea-level records in western Luzon, Philippines
Abstract
Reconstruction of deglacial sea level is critical for understanding the processes of paleoclimate change, ice volume wax-and-wane and mantle viscosity studies. Coral reefs have been used to provide late Pleistocene and Holocene sea-level curves, Here we present a new 230Th-dated coral-based deglacial sea-level records between 10,256 ± 50 yr BP to 6,654 ± 29 yr BP (before 1950 AD) of western Luzon, Philippines. The results indicate that the reef started growing about 10.3 kyr BP, and was about 29 m below present sea level (PSL), and grew upward at a rate of 6 m/kyr prior to 7.2 kyr BP, ~ 8 m below the PSL. The sea-level curve of Paraoir is consistent with those of northwestern Luzon and Western Australia coast. The sea-level records of Luzon, which is located in an island arc-setting, are significantly higher than those of Tahiti, which is located on oceanic crust. Different regional hydro-isostatic adjustment is most likely the reason of this discrepancy and should be corrected for better reconstruction of correction of Holocene sea level.
- Publication:
-
EGU General Assembly Conference Abstracts
- Pub Date:
- April 2013
- Bibcode:
- 2013EGUGA..15.2224G