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Evidence of tilting of the U.S. coast
Accurate sea level markers
Roe Plains, Australia
The team’s first expedition
Researchers take advantage of a celestial collision
Uplift exposes a repository of Pliocene sediments
Researchers study crater of hydrogen bomb test
The Wagnanui Basin on New Zealand’s North Island was once a shallow marine basin. For millions of years, including the period before and during the Pliocene, sediments gradually accumulated. Then the basin uplifted, exposing the sediments, creating the world’s most complete accessible record of Pliocene geology. A team of geologists from New Zealand's University of Wellington have dated and measured the elevation of Pliocene era sediments. Using the technique called backstripping, they’ve calculated the amount of land uplift since the sediments were formed. These calculations suggest a Pliocene sea level 15-20 meters (49-66 feet) above present.