Geologist to Discuss Possible Causes of Earth's Cooling in Oct. 17 Lecture

Wednesday, October 16, 2002

The possible causes of Earth’s drop in average temperature from about 75-degrees Fahrenheit 50 million years ago to an average global temperature of approximately 64.5 degrees today will be the topic of a public lecture by a geologist on Thursday, Oct. 17, at The University of Tulsa.

William W. Hay will present his illustrated talk at 7:30 p.m. in Room M-1 of Keplinger Hall, 5th Street and Harvard Avenue, home of the College of Engineering and Natural Sciences.

TU’s geosciences department will also hold an open house from 7 to 7:30 p.m., including rock, mineral and fossil displays, as part of the department’s observance of Earth Sciences Week.

Hay says the planet’s cooling is one of the most important trends in the Earth’s climate history and has resulted in the different regional climates seen today. “We are in one of the brief periods of global warmth of the last 2.5 million years. Most of that time large ice sheets have covered much of eastern North America and western Europe.”

Hay recently retired from GEOMAR, a marine geological research institute attached to Christian-Albrechts University in Germany.

For additional information, call the TU geosciences department at 631-3248.