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New Dating Technique May Revise Geologic Time Scale

s. Glaucony forms in shallow sea water and this process slows or stops if the ocean is too shallow or too deep. Consequently some grains may form in a sediment millions of years after it was deposited when sea level conditions above it are appropriate.

"We think we have a way of dating the times at which glaucony formation is going on, which allows us to follow the ups and downs of sea level," says Patrick Smith, another investigator from the department of physics at U of T. "Each grain is a different clock."

This new knowledge has applications in the oil exploration industry since the sea level conditions for forming glaucony are similar to those required for the growth of the organisms that eventually turn to oil.

Evensen and Smith worked on the study with lead investigator Derek York of U of T's physics department and Gilles Odin of the Universit P. et M. Curie. Funding was provided by the Natural Sciences and Engineering Research Council.

CONTACT:
Megan Easton
U of T Public Affairs
(416) 978-0260
megan.easton@utoronto.ca


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Contact: Megan Easton
megan.easton@utoronto.ca
(416) 978-0260
University of Toronto
6-Mar-1998


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