flash cards science
What does Geologic time scale mean?
it caregorizes Earth’s history into intervals based on significant geological and biological events.
What does Paleontology mean?
the study of fossils
what does Principle of Original Horizontality mean ?
a theory that says sedimentary rock layers are flat and horizontal
what does the Law of Fossil Succession mean?
when the same kinds of fossils in different places are the same age
what does the Principle of Superposition mean?
sedimentary rock layers on the bottom are older than rock layers on the top
what does stratigraphy mean?
science of layered rocks
what does Correlation mean?
process of matching up rock layers from different locations
what does fossil mean?
remains, traces, or imprints of animal and plant life preserved in Earth’s crust
what does Cross section mean
surface that is revealed when something is cut through
what does Index fossil mean ?
is a short-lived organism with a wide geographic range, used to date rock layers.
what does Unconformity mean?
a gap in the geologic record.
