Dr. Ross Powell, right, a geologist from Northern Illinois U

Dr. Ross Powell, right, a geologist from Northern Illinois University, peers closely at sediment layers during the daily morning briefing at McMurdo Station in Antarctica, as micropaleontologist Paola Maffioli looks on, December 8, 2006. (Photo by Chris Walker/Chicago Tribune/Tribune News Service via Getty Images)
Dr. Ross Powell, right, a geologist from Northern Illinois University, peers closely at sediment layers during the daily morning briefing at McMurdo Station in Antarctica, as micropaleontologist Paola Maffioli looks on, December 8, 2006. (Photo by Chris Walker/Chicago Tribune/Tribune News Service via Getty Images)
Dr. Ross Powell, right, a geologist from Northern Illinois U
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Credit:
Chicago Tribune / Contributor
Editorial #:
112920597
Collection:
Tribune News Service
Date created:
December 08, 2006
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License type:
Rights-managed
Release info:
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Source:
Tribune News Service
Object name:
20070710-AMX-WORLD_NEWS_SCI-ANTARCTI(7)