Lecture 11 - Lecture11 GeologicTime 07/03/200809:19:00

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07/03/2008 09:19:00 Geologic Time [iClicker] Select the principle of relatice dating that is most useful in  correlating rock strata among widely separated areas (regionally).  Answer: Faunal Succession Principal of Faunal Succession – William Strata Smith in 1815 published first  geologic map of England o Faunas (fossils) succeed one another over time in a regular and  determinable order o Similar fossils = Similar Rocks = Similar Age o Relative ages of determines from fossil content Relative Time Biostratigraphy Morphology Geologic Time Scale Sedgewick – Northern Wales; Rocks; Named his rocks the Cambrian Murchison – Southern Wales; Rocks and Fossils; named his Silurian Fossils have time significance, Rocks do not. Precambrian: 87% of Earth History Cambrian: First abundant fossil evidence Paleozoic Era: ancient life
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Lecture 11 - Lecture11 GeologicTime 07/03/200809:19:00

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