Earth History

stratigraphy

rock record

uniformitarianism

superposition

original horizontality 

correlation

cross-cutting relationships

extrusion

intrusion

faulting

folding

volcanic ash layer

erosion

unconformity 

inclusion

fossil record

index fossil 

extinction 

evolution 

geologic time scale

relative dating 

absolute dating

isotope 

radioactive decay

half-life

meteoritic debris

outgassing

red-shift (Doppler effect)

Big Bang