The Rock and Fossil Record
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The same geologic processes have been at work throughout Earth's history.
The principle of uniformitarianism
THe principle that states that geologice change is sudden
The study of past life using fossils.
Sciencetist who study past life using fossils.
Remains of organisms preserved by geologic processes
The study of the history of the Earth
Most fossils are preserved in
A missing layer of rock in a sequencing parallel rock layer
The idea that younger rocks lie on top of older rocks.
A break in the geologic record.
The process of figuring out if an object is older or younger than another.
The process of wearing down.
A missing layer that exitsts between horizontal and folded rock layers.
A break in the Earth's crust.
Process in which minerals replace tissues.
The process of figuring out how old an object is
The most common method of absolute dating
The time it takes for one-half of a radioactive sample to decay
The process in which radioactive isotopes break down into stable isotopes
Mark or Cavity
Fossil from a specific time period
Fossil formed by an animal's movement
mold filled with sediment
What is hardened tree sap?
Largest division of geologic time.
Unit of geologic time that includes two or more periods
Third largest division of geologic time
Fourth largest division of geologic time
Death of a species
Standard method that divides Earth's history into parts
Geologic Time Scale
A mark left by a dinosaur's tail would be considered a
How many years of Earth's history do geologists study?
4.6 Billion Years
To reconstruct Earth's climate history, Scientists drill out?