11. These layers are distinguishable as having many fossils and are important for the study of biostratigraphy . 12. He was an expert in the Tertiary of Washington State and specialized in biostratigraphy using Foraminifera. 13. The principle of faunal succession is used in biostratigraphy to determine each biostratigraphic unit, or biozone. 14. "' Dinosaur biostratigraphy "'studies the distribution of dinosaur taxa through rock layers. 15. Much of his work focused on linking mammalian fossils to specific geologic formations, a field known as biostratigraphy . 16. For the first 150 years of geology, biostratigraphy and superposition were the only means for determining the stratigraphers. 17. Chemostratigraphy also has acted as a check on other sub-fields of stratigraphy such as biostratigraphy and magnetostratigraphy. 18. Geologists employ biostratigraphy , the use of index fossils, for dating sedimentary rock units like the Coon Creek. 19. Another of this work's significant contributions to mosasaur biostratigraphy concerned the mosasaurs of the Smoky Hill Chalk. 20. The study of these fossils has facilitated important contributions to biostratigraphy , paleontology, taxonomies are found in the literature.
