Long-Term Sea-Level Fluctuations Driven by Ocean Basin Dynamics
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Material Information

Title:
Long-Term Sea-Level Fluctuations Driven by Ocean Basin Dynamics
Series Title:
Science Magazine Volume 319, Number 1357
Creator:
Muller, R. Dietmar
Sdrolias,Maria
Gaina,Carmen
Steinberger,Bernhard
Heine,Christian
Publisher:
American Association for the Advancement of Science
Publication Date:
Language:
English

Subjects

Subjects / Keywords:
Climate change ( lcsh )
Sea level rise ( lcsh )
Flooding ( lcsh )
New jersey ( lcsh )

Notes

Abstract:
Earth’s long-term sea-level history is characterized by widespread continental flooding in the Cretaceous period (~145 to 65 million years ago), followed by gradual regression of inland seas. However, published estimates of the Late Cretaceous sea-level high differ by half an order of magnitude, from ~40 to ~250 meters above the present level. The low estimate is based on the stratigraphy of the New Jersey margin. By assimilating marine geophysical data into reconstructions of ancient ocean basins, we model a Late Cretaceous sea level that is 170 (85 to 270) meters higher than it is today. We use a mantle convection model to suggest that New Jersey subsided by 105 to 180 meters in the past 70 million years because of North America’s westward passage over the subducted Farallon plate. This mechanism reconciles New Jersey margin–based sea-level estimates with ocean basin reconstructions.

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Source Institution:
Florida International University
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Sea Level Rise