Fossils
Volcanoes/Mts.
Animals
Bodies of Water
Misc.
100
These provide evidence of beaches
What are trilobites and seashells.
100
When plates collide, these are formed.
What are mountains/volcanoes.
100
This animal may have been present in Washington although no fossils have been found.
What are dinosaurs.
100
500 mya the ocean off of Washington began here.
What is Spokane.
100
Plate movement and volcanic eruptions caused this to form.
What are the Cascade Mountains.
200
This provides evidence that Washington was once under water.
What are fossils from the ocean.
200
This is a local, active volcano in Washington that erupted in 1980.
What is Mt. St. Helens.
200
Clams, snails, crabs and fish once lived here 50 mya off the coast.
What is the ocean (or Puget Sound).
200
50 mya ago, none of this existed, but it did 20,000 years ago.
What is ice.
200
The basalt flows created this.
What is the Columbia Plateau.
300
These indicate warm, wet weather.
What are palms or ferns.
300
This mountain range began to formed 1 mya.
What are the Cascade Mountains.
300
These large mammals disappeared 12,000 years ago.
What are mammoths or giant sloths.
300
The Columbia River Gorge "bed" is made of this.
What is basalt.
300
Layers of lava are evidence of this.
What are former volcanoes.
400
These form calcite deposits.
What are coral reefs and sea shells.
400
This is evidence that there were former volcanic mountain ranges.
What are layers of lava.
400
These animals evolved here but moved away due to climate changes.
What are camels and horses.
400
These caused the Columbia River Gorge to form.
What are glaciers and the Missoula floods.
400
This was the warmest time ever on the planet.
What is 50 mya.
500
These disappeared the same time humans appeared, 12 thousand years ago.
What are large mammals such as mammoths, sloths.
500
This is where 160 mya a volcanic mountain range ONCE existed, but is no longer there.
What is Eastern Washington.
500
A camel indicated that this type of climate existed.
What is warm and dry.
500
15 mya the Olympic Mountains were located here.
What is the bottom of the Pacific Ocean.
500
These are formed from coral sea shells.
What are calcite deposits.
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