Sea-level records at ;80 ka from tectonically stable platforms: Florida and Bermuda
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Material Information

Title:
Sea-level records at ;80 ka from tectonically stable platforms: Florida and Bermuda
Series Title:
Geology Magazine Volume 24 Number 3
Creator:
Ludwig, K.R.
Muhs, D.R.
Simmons, K.R.
Halley, R.B.
Shinn, E.A.
Publisher:
The Geological Society of America
Publication Date:
Language:
English

Subjects

Subjects / Keywords:
Climate Change ( lcsh )
Florida ( lcsh )
Sea Level Rise ( lcsh )
Plate tectonics ( lcsh )

Notes

Abstract:
Studies from tectonically active coasts on New Guinea and Barbados have suggested that sea level at;80 ka was significantly lower than present, whereas data from the Atlantic and Pacific coasts of North America indicate an;80 ka sea level close to that of the present. We determined ages of corals from a shallow submerged reef off the Florida Keys and an emergent marine deposit on Bermuda. Both localities are on tectonically stable platforms distant from plate boundaries. Uranium-series ages show that corals at both localities grew during the ;80 ka sea-level highstand, and geologic data show that sea level at that time was no lower than 7–9 m below present (Florida) and may have been 1–2 m above present (Bermuda). The ice-volume discrepancy of the 80 ka sea-level estimates is greater than the volume of the Greenland or West Antarctic ice sheets. Comparison of our ages with highlatitude insolation values indicates that the sea-level stand near the present at ;80 ka could have been orbitally forced.

Record Information

Source Institution:
Florida International University
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Aggregations:
Sea Level Rise
Florida Documents Collection