The Chicxulub Impact, the asteroid impact dated to the Cretaceous-Paleogene boundary. Belongs here: a phenomenon whose primary identity is a dated event fixing a point on the geologic time scale. Does not belong here: the extinction event itself that the impact is associated with, held under Stratigraphy, where the fossil and rock record rather than the impact date is the phenomenon's own primary evidence.
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Field of StudyGeochronology is the science of determining the age of rocks, fossils, and sediments using signatures inherent in the rocks themselves. 1 All Geochronology
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1. Geochronology (Wikipedia)
Wikimedia FoundationGeochronology, lead sentence (phenomenon-discipline bucket)Quote, Geochronology, lead sentence (phenomenon-discipline bucket)
Geochronology is the science of determining the age of rocks, fossils, and sediments using signatures inherent in the rocks themselves.
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