Types of Fossils
Living things' tissues are replaced by hard minerals (stone)?
petrified
A fossil made by life, but not a part of the organism itself?
Trace Fossils
What states Earth events can be explained by what happens today?
uniformitarianism
These are preserved remains of ancient life?
fossils
What did crustal plate motions form?
mountain rangers, ocean trenches, volcano chains
Hardened sap of trees and may trap insects and small creatures?
amber
The impression made by life (footprints)?
What is the name of the famous tar pit in California?
La Brea
250 million yr old supercontinent?
Pangea
rainfall, pollution, ancient fires, and temperature
Hardened tar deposits that can form fossils?
asphalt
Hollows in rock left when an organism decays?
molds
What does the geologic history of the earth tell us?
The earth's past is based on rock formations and fossil record.
How old is the Earth?
4.6 billion years old!
Three geologic processes that remained the same over time?
erosion, deposition, and volcanism
Organisms trapped in ancient ice, often glaciers?
frozen fossils
cast
Usually fossilized parts of an animal?
bones, shells, (teeth?)
What do fossils indicate?
This tells the earth's climate, landforms, and life?
fossil record
Includes petrified bones, trees, shells?
petrified
borrows
Earth's continents move as their crustal plates move due to?
volcanism
Plant parts that are commonly fossilized?
Stems and pollen
3 aspects of the earth’s history illustrated by the Fossil Record?
climate, landforms, and life