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The Sunken Forests of New Hampshire are two large areas of tree stumps submerged off New Hampshire'smarker coast. They sank below sea level after the ending of the Wisconsin Glaciation and subsequent rise in temperature; isostatic rebound has not kept pace with the rise in sea level, and former coastal forests were overtaken by the Atlantic Oceanmarker.

The trees could not thrive, even when they were in the early stages of sinking, because they cannot live in salt water for very long. All that is left of the forests are stumps.


Odiorne Point Sunken Forest

Near Odiorne Point State Parkmarker in Ryemarker, this sunken forest is referred to as the "Drowned Forest". The roots of different coniferous trees (including white pine and hemlock) are visible at most low tides. Core samples taken from the roots date the trees to be about 3,500 - 4,000 years old! Scuba divers commonly explore to the Drowned Forest to learn about these ancient remains.

Jenness Beach Sunken Forest

The Jenness Beach forest, much larger than Odiorne Point, is rarely sighted above sea level. Sightings have occurred in 1940, 1958, 1962, and 1978. The trees, eight to ten feet in circumference, have been carbon dated from 3,400 to 3,800 years old. Currently, only 56 stumps remain, but due to the circumference of the trees, it was likely to have been a much vaster forest. The seafloor on which it sits was probably submerged after the Wisconsin glaciation. Some estimates say that the coastline of New Englandmarker used to extend 75 miles east of its current position; a Native American of the era could have walked from Nantucketmarker to southern Cape Codmarker without touching the Atlantic Ocean. Another estimate states that New Hampshire's shore could have been a few miles inland . The former estimate is more likely. Fishermen have hauled up mastodon and mammoth teeth miles offshore, suggesting that the forest extended quite far from its western shoreline boundary. The last few yards of the transatlantic telegraph cable laid in 1874 may have gone through the sunken forest.

External links


  • Bisceglia, Michael. "Ice Age coastline". Hampton Union. May 9, 2006.
  • Pielou, E.C. 1992. After the Ice Age: The Return of Life to Glaciated North America

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