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Nunavut's mysterious ancient life could return by 2100
Date:9/21/2012

This press release is available in French.

Global climate change means that recently discovered ancient forests in Canada's extreme north could one day return, according to Alexandre Guertin-Pasquier of the University of Montreal's Department of Geography, who is presenting his findings at the Canadian Paleontology Conference in Toronto today. "According to the data model, climate conditions on Bylot Island will be able to support the kinds of trees we find in the fossilized forest that currently exist there, such as willow, pine and spruce. I've also found evidence of a possible growth of oak and hickory near the study site during this period.," Guertin-Pasquier said. "Although it would of course take time for a whole forest to regrow, the findings show that our grandchildren should be able to plant a tree and watch it grow."

The fossilized forest found on Bylot Island in Nunavut is between 2.6 and 3 million years old according to estimations based on the presence of extinct species and on paleomagnetic analyses. Paleomagentic analysis involves looking at how the Earth's magnetic field has affected the magnetic sediment in rocks like a compass, they turn to follow the magnetic poles. Scientists can use this information to date rocks as the history of the movement of the magnetic poles is relatively well known.

Wood samples in the ancient forest have been preserved throughout the eons in peat and by permafrost. "We studied the sediments in the forest and discovered pollen that are usually found in climates where the annual average temperature is around 0 degrees Celsius or 32 Fahrenheit," Guertin-Pasquier said. By comparison, current average conditions on Bylot Island are around -15C ( 5F). The samples were taken from few drill holes 10 cm in diameter of one to two metres deep. The harshness of the Arctic winter and the remoteness of the forest mean t
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Contact: William Raillant-Clark
w.raillant-clark@umontreal.ca
514-343-7593
University of Montreal
Source:Eurekalert  

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Nunavut's mysterious ancient life could return by 2100
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