2 pt 3 pt 4 pt 5pt 1 pt 2 pt 3 pt 4 pt 5 pt 1 pt 2pt 3 pt 4pt 5 pt 1pt 2pt 3 pt 4 pt 5 pt 1 pt 2 pt 3 pt 4pt 5 pt 1pt Special Info 1 Rocks Types of Fossils More FossilsSpecial Info 2
He was the name of the explorer who mapped out he Grand Canyon
Who was John Wesley Powell?
These are always younger than the rock layers around them.
Extrusion, intrusion, and faults.
These are the process responsible for making the Grand Canyon
Weathering, erosion, plate tectonics, converging plates, ice, and volcanoes
This is younger than the other layers.
The Fault labeled Y.
This was a high, flat, land formed west of the Rocky Mountains
The Colorado Plateau
This type of rock is formed from sediments
Sedimentary Rocks
The rock that responds to acid by bubbling because it has calcite in it
What is Limestone?
It is another name for rock layers
What is strata?
Denoted rough rapids on the Colorado River
What is rough, rigid, and harder rocks?
Rocks made from hardened lava
What is igneous rock?
The remains or imprints of once live organisms
What are fossils?
The type of fossil that is formed by minerals absorbing into the hard parts of the organism and turning it into rock
What are petrified fossils?
Organisms that have been covered by tree resin and the resin hardens overtime fossilizing them.
What are fossils in amber?
Fossils that are widely distributed and occurred for only short periods of time.
What are index fossils?
Hollow impression in sediment that is the shape of an organism
What are molds?
Copy or replica of the shape of an organism
What are casts?
Fossils that are evidence that the organism was there, but not a part of the organism.
What are Trace Fossils?
These include bone, shells, teeth, and woody stems.
What are the parts of the organism that form fossils?
The 3 main things fossils tell scientists
What kind of organisms lived I the past. How the organisms have changed. How the environment has changed
A foot print, animal burrows, and caprolites
What are examples of Trace Fossils?
This is the age of rocks when comparing rock layers
What is relative age?
States that rock layers on the bottom are always older that layers above them.
What is the Law of Superposition?
The exact number of years since the rock has been formed.
What is absolute age?
Why index fossil are so important to us.
They tell the relative age of rock layers
Characteristics of an index fossil.
What are: Only occurred I one time period. Widely distributed?
Final Jeopardy Place you bets?
This is what geologists use to study how old something is and how long ago something occurred.
What is the Geologic Time Scale?