Deformation in response to landscape evolution during glacial cycles on the U.S. Atlantic passive margin

Gregory Ruetenik, Robert Moucha, Bas de Boer

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

Elevations of Pleistocene highstand formations that lie across the South Carolina and northern Georgia coastal plain lie well above those of reconstructed past sea levels. This discrepancy has been attributed to some combination of tectonics, glacial isostatic adjustment, and/or deviations in estimated ocean volumes derived from the marine δ18O record. To reconcile these anomalous elevations, we combine a landscape evolution model with models of coupled ice sheet, sea level and solid Earth deformation along the southern U.S. Atlantic passive margin to estimate erosion, deposition and corresponding isostatic response since Marine Isotope Stage (MIS) 11 (∼410 ka). We find that along-shore changes in modeled paleo-shoreline elevations are similar to measured elevations along 100s of kilometers. Up to 10 m of shoreline uplift since MIS 11 may be attributed to isostatic feedback in response to sediment redistribution.

Original languageEnglish (US)
Article number115759
JournalEarth and Planetary Science Letters
Volume526
DOIs
StatePublished - Nov 15 2019

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Keywords

  • coastal processes
  • geodynamics
  • sea level
  • surface processes

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science

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