Chapter 7: Stones and Bones: Studying the Fossil Record
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10 Terms
biostratigraphy
A relative dating method that uses other plant and animal remains occurring in the stratigraphic context to establish time depth.
chronometric dating
Dating methods that give estimated numbers of years for artifacts and sites.
epochs
The smallest units of geologic time, spanning thousands to millions of years.
fossilization
The process by which an organism becomes a fossil.
fossils
Mineralized copies of organisms or activity imprints.
(law of) superposition
he scientific law that states that rock and soil are deposited in layers, with the youngest layers on top and the oldest layers on the bottom.
radioactive decay
The process of transforming the atom by spontaneously releasing energy.
relative dating
Dating methods that do not result in numbers of years but, rather, in relative timelines wherein some organisms or artifacts are older or younger than others.
stratigraphy
A relative dating method that is based on ordered layers or (strata) that build up over time.
taphonomy
The study of what happens to an organism after death