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Sea Levels during the Past 35,000 Years.

J D Milliman, K O Emery

Science (New York, N.Y.)

|December 6, 1968

Summary

This study presents a sea-level curve for the U.S. Atlantic shelf over the past 35,000 years. It reveals a significant sea-level drop followed by a rapid rise during the Holocene transgression.

Area of Science:

Geology
Paleoceanography
Quaternary Science

Background:

Reconstructing past sea levels is crucial for understanding Earth's climate dynamics.
The Atlantic continental shelf of the United States provides a valuable record of sea-level changes.

Purpose of the Study:

To establish a detailed sea-level curve for the U.S. Atlantic continental shelf spanning the last 35,000 years.
To compare this regional curve with global sea-level data.

Main Methods:

Utilized over 80 radiocarbon dates from various shallow-water materials.
Included dating of mollusks, oolites, coralline algae, beachrock, and salt-marsh peat.
Analyzed data to construct a sea-level curve from 35,000 years ago to the present.

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Main Results:

Sea level was near present levels 30,000–35,000 years ago.
Sea level dropped to approximately -130 meters 16,000 years ago due to glacial growth.
Holocene transgression began around 14,000 years ago and accelerated until 7,000 years ago.

Conclusions:

The developed sea-level curve for the U.S. Atlantic shelf aligns with global data.
The findings suggest the curve approximates the eustatic sea-level curve for the analyzed period.