Show:
Grand Canyon History
Scientists
Notes
Earth History
Fossil
100
The youngest layer in grand canyon
What is Kaibab layer?
100
They are people that study Earth.
What is a geologist?
100
The material that glues the sand together in sandstone is called this.
What is a matrix?
100
It formed about 4.5 billion years ago.
What is Earth?
100
The remains or trace of organisms that have been preserved in Earth's crust.
What is a fossil?
200
It started forming about 6-70 million years ago.
What is The Grand Canyon?
200
Had the theory that the dinosaur were extinct by asteroid impact,
Who is Alvarez?
200
The particles of Earth material that settled out of the water.
What are sediments?
200
It is the earliest form of life.
What is bacteria?
200
It provides geologists with important evidence about the age of rock layers.
What is an index fossil?
300
Three layers of the Grand Canyon formed in the Cambrian period.
What is Muav limestone, Bright Angle Shale, Tapeats sandstone?
300
He thought the continents were together and the drifted.
Who is Wegener?
300
The removal or transportation of loose Earth material.
What is erosion?
300
It was when all of the continents came together and formed this.
What is Pangea?
300
This kind of rock is most likely to contain fossils.
What is sedimentary rock?
400
The oldest layer in The Grand Canyon?
What the Vishnu layer?
400
He is a British expert that thought the Earth was molten.
Who is Kelvin?
400
The setting out eroded Earth material.
What is deposition?
400
It helped dinosaurs get bigger.
What are trees?
400
This kind of rock is least likely to contain fossils.
What is igneous and metamorphic rock?
500
Name two major landforms that formed The Grand Canyon.
What is The Colorado River and Colorado Plateau?
500
He is an expert of continental movement.
Who is McMeaninn?
500
The resistance of being scratched.
What is a minerals hardness?
500
It wiped out 95% of Earths life.
What is The Great Extinction?
500
Name two fossils.
What is trilobites and dinosaur fossils?