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6SC Paleontology

TermDefinition
relative age age of a rock compared to the age of rock layers
extinct volcano that has ceased erupting
extinction death of every member of a species
law of superposition in horizontal layers of sedimentary rock, each layer is older than the layer above it
law of superposition in horizontal layers of sedimentary rock, each layer is younger than the layer below it
geologic time scale record of the geologic events and life forms in Earth's history
index fossils fossils of widely distributed organisms that lived during only one short period
fossil preserved remains or traces of living things
Principle of Uniformitarianism the same things that happened in the past still occur today
Principle of Original Horizontality Sediment is originally laid down horizontally,
relative age the age the law of superposition gives us
absolute age the age of a rock in numbers of years old (6 million) exact age
3 things learned from studying fossils how the surface, life, and climate has changed over time
era, period, epoch largest unit of time to smallest
how fossils form organism dies and is covered with sediment before it decays
fossils are found in sedimentary rock
Created by: cj_ritter
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