1
Geologic
The study of the earth (geo=earth; logic=study of)
Extinction
The act of no longer existing
Mass Extinction
a period of time when a large percentage of species on Earth die out
Era
a major division of time that is a subdivision of an eon and is itself subdivided into periods
a long and distinct period of history with a particular feature or characteristic.
Period
a major division of geological time that is a subdivision of an era and is itself subdivided into epochs, corresponding to a system in chronostratigraphy.
a length or portion of time.
Epoch
a division of time that is a subdivision of a period and is itself subdivided into ages, corresponding to a series in chronostratigraphy.
a period of time in history or a person's life, typically one marked by notable events or particular characteristics.
Fossilization
the process by which an organism's remains are preserved in rock over a long period of time
Index Fossil
any animal or plant preserved in the rock record of the Earth that is characteristic of a particular span of geologic time or environment
Law of Superposition
Big Concept- the oldest rock is on the bottom
in a sequence of rock layers, the oldest layer is at the bottom and the youngest layer is at the top.
Give me an example of an extinct animal
Dinosaurs