Word: fossilizing
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Dates: during 1960-1969
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Analysis of the slices, Heezen reported to an oceanographic conference at Moscow University, showed that the most recent magnetic-field reversal occurred about 700,000 years ago, following earlier flips 2,500,000 and 3,500,000 years ago. Fossil remnants in the slices also indicated that several new species of algae and protozoa suddenly appeared about 2,500,000 years ago and existed without significant change until 700,000 years ago. Then, within a short time span, some of those species completely disappeared, others underwent marked change, and new species emerged...
Although all fossil collecting is under control of the Argentinian government, the provincial governor of La Rioja defied the law and issued a personal decree forbidding the removal of any fossils from La Rioja. He was responding to a "they're robbing the province of its natural heritage" campaign which began when the value of the expedition's find became known...
...expedition was financed by a National Science Foundation grant. The fossil hunters. Arnold D. Lewis, head preparator at the MCZ, James A. Jensen, former MCZ preparator, Rosendo Pascual of the University of La Plata, and Romer and his wife worked from November, 1964 to February...
...also has scrutinized fossil records to see whether they confirm the discoveries of geneticists who have studied only living organisms...
Simpson also has traced the history and geography of mammals from fossil records and has contributed to the biological classification of mammals...