11.08.13.friday

The big spans of time from largest to smallest periods

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Unformatted text preview: The Science of Biology 5 11/7/13 Adam Sedgwick    Adam Segwick was an 19th century geologist who carefully examined the rock formations of England.    His study of England’s geology led him to believe the earth had gone through several ages.    He gave the the name to the “Cambrian” period, named for “Cambria,” the Latin name for Wales, because that is where he found rocks that attested to an earlier age of the earth. The Big Spans of Time    From largest to smallest periods    supereon ({super} + {eon})    eon < Greek αἰών [age]    era < Latin aera [fixed date]    period < Greek περίοδος [way around= one trip around = one stage of a larger whole]    epoch < Greek ἐποχή [ stopping point]    He was a teacher and friend of Darwin, though, for religious reasons, he rejected Darwin’s ideas.    His work was important in establishing our Adam Sedgwick in 1867 current views of the earth’s geological history. The Precambrian After the Precambrian Supereon    All the time before the Cambrian Period, identified by Sedgwick, is called the “Precambrian” < {pre} (= before) + cambrian.    The P...
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