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Geology of the Pacific Northwest

Across
The rigid outer layer that includes the crust and mantle.
The center of the earth.
A vent in the earth's surface through which magma, ash and gases erupt.
The air surrounding the earth
A smaller river or stream that does not flow directly into the ocean.
After a volcano erupts it can cause a bowl-like depression that can fill up with water.
Map makers
Magma that has risen to the surface of the earth.
The thin, brittle, outer layer of the earth.
A community of plants and animals living in the same area and relying on each other to survive.
The action when two plates slam together causing rocks to buckle and rocks to push upward forming mountains and hills.
The study of the earth and its features, especially the shape of the land, climate, countries, people and natural resources.
Low land between hills and/or mountains.
The hard outer layer of the earth that is broken up into sections that fit together. These are part ocean and part continental.
Down
A crack in the outer layer of the earth where the rocks have moved past one another.
The middle layer of the earth.
A large body of salt water that surrounds a continent and covers more than two-thirds of the Earth's surface.
An area that can be found in the middle of a plate, where hot magma rises to the surface.
A large, flowing body of water that usually empties into a sea or ocean.
A body of ice that slowly moves downhill due to gravity.
A type of map with a detailed description or representation of the natural or artificial features of an area.
The earth's water, including oceans, rivers, lakes, glaciers, and water vapor in the air.
Mountain range caused by folding.
A sudden movement in the outer layer of the earth along the earth's fault line.
The theory that the earth is made up of interconnected plates that are constantly moving around.
The plate relating to the earth's large land masses.
The range of volcanoes formed when tectonic plates pull and rift causing the earth's crust to crack and magma to push out.
When a surface is worn away by wind or water.
The scientific study of history and physical nature of the earth.
Partially melted rock below the surface of the earth.
A raised area or mound of land.