Evidence for a rapid sea-level rise 7600 yr ago

• Published in: Geology
• Main Authors: Yu, Shi-Yong, Berglund, Björn E, Sandgren, Per, Lambeck, Kurt
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: Geological Society of America Inc
• Subjects: Keywords: Crustal rebound; Sea level rise; Geochronology; Hydrogeology; Lakes; Oceanography; glacial rebound; Holocene; isostasy; Scandinavian Ice Sheet; sea level change; transgression-regression cycle; Atlantic Ocean; Baltic Sea Baltic sea; Crustal rebound; Lake isolation; Laurentide Ice Sheet decay; Rapid sea-level rise; Ice Sheet
• Online Access: http://hdl.handle.net/1885/21720; https://doi.org/10.1130/G23859A.1; https://openresearch-repository.anu.edu.au/bitstream/1885/21720/5/u4352516xPUB18_Lambeck.pdf.jpg; https://openresearch-repository.anu.edu.au/bitstream/1885/21720/7/01_Yu_Evidence_for_a_rapid_sea-level_2007.pdf.jpg

Dating the transgression and subsequent regression in marginal basins of the southeastern Swedish Baltic Sea provides a new perspective of global ice-volume changes and the isostatic adjustment of the mantle after the retreat of the Scandinavian Ice Sheet from this area. Super-imposed upon a smooth pattern of local sea-level rise, acceleration occurred ca. 7600 calibrated (cal) yr B.P., evidenced as a nearly synchronous flooding in six elevated basins ranging from 3.0 to 7.2 m above present sea level. We ascribe this rapid local sea-level rise of ∼4.5 m to a sudden increase in ocean mass, most likely caused by the final decay of the Labrador sector of the Laurentide Ice Sheet. The subsequent monotonic fall of local sea level from ca. 6500 cal yr B.P. to the present is mainly an expression of the slow isostatic adjustment of the mantle.