lec_15_relative_time_scale

lec_15_relative_time_scale - – Published first geologic...

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Relative time scale
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Steno • Niels Stensen (1638-1686) Danish physician and anatomist – Research in Italy in 1660s, published geological conclusions in 1669 (Prodromus) • Superposition • Original lateral continuity • Original horizontality
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Strata Smith • William Smith (1769-1839) English surveyor – Made practical observation that each individual rock layer contained its own specific assemblage of fossils (Faunal Succession: first written down in 1796)
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Unformatted text preview: – Published first geologic map of England (1815) Geologic systems • Large thicknesses of sedimentary rocks that crop out over a region • Descriptive names originally, based on rock type (Cb, K) • Later named for geographic region where exposed • Using faunal succession principle, systems based on fossil content rather than lithology • By c. 1840 most of the systems recognized and named (Ordovician in 1879)...
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This note was uploaded on 12/08/2011 for the course GEO 101 taught by Professor Gillen during the Spring '08 term at Miami University.

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lec_15_relative_time_scale - – Published first geologic...

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