ANT-4320 Lecture Notes - Lecture 4: Principle Of Faunal Succession, Lithostratigraphy, Biostratigraphy
1 Feb 2017
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Lithostratigraphy: bed (layer, member, formation, group, supergroup. We are mostly going to be concerned with the cenozoic era. The quaternary period is when the genus homo arose. Study of rock layers and their relationship with each other. 4 basic principles of lithostratigraphy: original horizontality. States that layers of sediment are originally depositied horizontally under the action of gravity: superposition. Each bed of rock is older than the one above it and younger than the one under it. A is older than b is older than c: faunal succession. Based on the observation that strata contained fossilized animal and plant remains. These flora and fauna succeed each other vertically in a specific, reliable order which can be identified over wide horizontal distances: cross-cutting relationships. States that the geologic feature that cuts another is the younger of thw two features. Unconformities: long periods when deposition ceased and erosion removed layers before deposition resumed.
