Biostratigraphic dating relies on

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It was application of a Darwinian idea—that the sequence of fossils through time represents successive events of evolutionary change and extinction—that put the geologic science of biostratigraphy on a much stronger footing.Later, this relative time scale of fossil sequences would be calibrated with radiometric dates.Geologic research and mapping requires the determinations of the ages and composition of rocks.A geologic map or report typically is only a summary of investigations that frequently involve the collecting and processing of hundreds of rock samples, followed by the evaluation and interpretation of data from a variety of analytical techniques.Although Darwin was only partially correct when he attributed the evolution of the islands to reef growth and erosion, his explanation played an important role in future understanding of seafloor spreading and the now widely accepted theory of plate tectonics, which describes the large-scale movement of the Earth’s outermost shell.Most people think of evolution as relating to biology and paleontology.—— Please see the Resources section for the Bibliography/Additional Reading list for this essay.Geochronology is the science of dating and determining the time sequence of events in the history of the Earth.

Darwin’s theory revolutionized and became the foundation for all of biology, but for the reasons mentioned above, it was just as much the foundation for geology as well.A relative age is the age of a fossil organism, rock, or geologic feature or event defined relative to other organisms, rocks, or features or events rather than in terms of years.Tradition paleontological and biostratigraphic correlation methods are still perhaps the most common relative dating methods used by geologists.What they don't realize is that most paleontologists are also geologists, who use fossils to date rocks and study past environments.Darwin’s Theory of Evolution is the structure that supports these efforts.

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