Earth History 1

changes in Earth's crust and extinctions caused by sudden and unusual events

• catastrophism

• uniformitarianism

• geologic time scale

• unconformity

a gap in the geologic record

• catastrophism

• uniformitarianism

• geologic time scale

• unconformity

the theory that changes in the Earth's crust during geological history are due to continuous and repetitive processes

• catastrophism

• uniformitarianism

• geologic time scale

• unconformity

a timeline of earth's geologic history

• catastrophism

• uniformitarianism

• geologic time scale

• unconformity

the largest sections of the geologic time scale

• eon

• era

• period

• epoch

the second largest sections of the geologic time scale

• eon

• era

• period

• epoch

the third largest sections of the geologic time scale

• eon

• era

• period

• epoch

the smallest sections of the geologic time scale

• eon

• era

• period

• epoch

the end of a species

• extinction

• unconformity

• uniformitarianism

• catastrophism

formed when magma or lava cools

• igneous rock

• metamorphic rock

• sedimentary rock

• unconformity