Dating of fossils and rocks lejonkungen 2 swedish online dating
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He began to identify rock layers by the fossils they contained, and he even noticed that the general order of strata was identical over many different parts of the country.
Smith was the first person to understand the principle of fossil succession.
We don't want to use fossils belonging to species that lived for too long; these fossils would show up in more than one rock layer.
Stegosaurus and Triceratops were not part of the same assemblage because they lived at different times.