Unit 3 Vocab

Front

Principle that in stratified sedimentary rocks, the lowest stratum is the oldest.

Back

Superposition

Front

Age of rock/fossil based on remaining carbon-14.

Back

Carbon Dating

Front

Hollow area in shape of organism

Back

Mold

Front

Solid copy of an organism

Back

cast

Front

Age of a rock compared to rock layers

Back

Relative Age

Front

Geologic age of a fossil or event in years.

Back

Absolute Age

Front

Minerals replace organism remains

Back

Petrified Fossil

Front

Evidence of activities (footprints, trails, etc)

Back

Trace Fossil

Front

Entire organism (e.g., frozen)

Back

Preserved Remains-

Front

A fossil used to date a specific geologic age.

Back

Index fossil