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Geologic Time and Earth’s

Geologic Time and earth s Biological HistoryDesigned to meet South Carolina Department of Education 2005 Science Academic Standards What is the Geologic Time Scale? (slide 4)Standard `Epochs, Eons, Eras, and Periods (slide 4) How was the time scale and it s divisions created? (slide 5) A complete Geologic Time Scale with references to (slides 6-7)Table of Contents Principles of the Geologic Time Scale (slide 8) Principles of Superposition, Horizontality and Original lateral continuity Principle of biologic succession (slide 9) Charles Lyell, the Principle of cross-cutting relations & Inclusion principle (slide 10) Charles Darwin Relative Age Dating using unconformities (slide 10)Standard Relative Age dating using cross-cutting relations and index fossils (slide 11) Absolute Age dating (slide 13) Isotopes and radiometric dating Carbon dating (slide 14) How old is old? (slide 16) Breakdown of Geologic time periods Are we now living in the Anthropocene Era?

-90% of Earths species become extinct, including trilobites, blastoids, fish and amphibians because of heavy volcanism in Siberia Table of Contents 6. 320 ferous ... This method can only be used when the rock layers are in their original sequence. All six of the original stratigraphic principles may be applied to determine the age of a rock.

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