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Fossils and Geo Hist

TermDefinition
fossil remains of animal or plant in a rock
index fossil fossil that is used for dating which it was found
permineralized remains process in fossilization where casts of organisms
molds and casts organisms buried dissolve away
original remains evidence of in rock that something is in presence of that time
trace fossils fossil of a footprint or any trace of animals
relative age determination of age of past events
superposition concept of behaving and nature
horizontality layers of sediment and deposited through gravity
absolute age true age of a fossil
half-life time required for any specific property
isotopes 2 or more forms of the same element
radioactive decay transformation of atomic nucleus
geologic time time from which things form
eon very long period of time
era time range that something takes place
period time whenm something takes place
epoch period of time in history or persons life
pangaea super continent that contains land masses
trilobite extinct animal the occurred during the Paleozoic era
precambrian depositing system of rocks
mesozoic era development of birds,flying reptiles,flowing plants, and extinction of dinosaurs.
cenozoic eara more recent,formation of modern continents,diverse mammals and plants
Created by: 3050698