Ch 5 Rocks, Fossils, and Time STUDENTS

Ch 5 Rocks, Fossils, and Time STUDENTS - Ch. 5: Rocks,...

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Ch. 5: Rocks, Fossils, and Time – Making Sense of the Geologic Record Key words - Stratigraphy - Superposition - Unconformities - Facies - Transgressions-Regressions - Fossils Stratigraphy Study of composition, origin, age relationships, geographic extent of stratified rocks Individual rock layer: stratum/strata Mostly sedimentary rocks Fundamental Principles (Steno, Hutton): see chapter 4 - Superposition - Original horizontality - Lateral continuity - Cross-cutting relationships - Inclusions o Inclusions are older than the rock itself - Fossil succession Unconformities Disconformity Angular unconformity Nonconformity Lateral Relationships Different depositional processes in adjacent environments E.g.  beach   nearshore   offshore Sand   mud   carbonate (Sandstone -> Shale -> Limestone) 1
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Sedimentary Facies: body of sediment with distinctive physical, chemical, and biological  attributes Intertonguing (pinching out), lateral gradation
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This note was uploaded on 03/27/2012 for the course GEOL 2413 taught by Professor Moody during the Spring '10 term at Texas A&M University, Corpus Christi.

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Ch 5 Rocks, Fossils, and Time STUDENTS - Ch. 5: Rocks,...

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