: Paleoclimatología: biostratigraphy

scientific discipline > stratigraphy > biostratigraphy

biostratigraphy

Biostratigraphy is the branch of stratigraphy which focuses on correlating and assigning relative ages of rock strata by using the fossil assemblages contained within them. The primary objective of biostratigraphy is correlation, demonstrating that a particular horizon in one geological section represents the same period of time as another horizon at a different section. Fossils within these strata are useful because sediments of the same age can look completely different, due to local variations in the sedimentary environment. Sequence biostratigraphy can be broadly defined as the analysis of microfossil distribution patterns in sediments or rocks for the purpose of recognizing unconformity bounded units (e.g., depositional sequence model) or units bounded by regional flooding surfaces (e.g., genetic sequence model). (Adapted from: https://en.wikipedia.org/wiki/Biostratigraphy and S. Zellers(1995). Marine Micropaleontology, 26(1), 255-271.)

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