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Magnitude and timing of episodic sea-level rise during the last deglaciation

Geology

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, , , and

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Abstract

A succession of elevated ridge deposits on the south Florida margin was mapped using high-resolution seismic and side-scan sonar imaging in water depths ranging from 50 to 124 m. The ridges are interpreted to be subtidal shoal complexes and paleoshorelines (eolian dune or beach) formed during the last sea-level transgression. Oolitic and skeletal grainstones and mixed skeletal-peloidal-ooid packstones were recovered using a research submersible. All of the grains are of shallow-water or intertidal origin, and both marine and nonmarine cements were identified. Formation and preservation of these features are attributed to episodic and rapid changes in the rate of the deglacial sea-level rise at the onset of the termination 1A ??18O excursion. This high-resolution record of sea-level change appears to be related to deglacial processes operating on submillennial time scales and supports increasing evidence of rapid episodic fluctuations in ice volume, climate, and ocean-circulation patterns during glacialinterglacial transitions.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Magnitude and timing of episodic sea-level rise during the last deglaciation
Series title:
Geology
Volume
24
Issue:
9
Year Published:
1996
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Geology
First page:
827
Last page:
830