Geo-history of the Pacific NorthwestBY AMY ANDERSON

Overview

What constitutes as the Pacific Northwest. Basalt floods Great Lake of Missoula floods Wind floods

Where is the Pacific Northwest The area that is included in

the Pacific Northwest is very debatable around the boarders. The three main states that make up the Pacific Northwest include Washington, Oregon, and Idaho.

The landscape here was formed by three major floods; basalt, Great Lake Missoula floods, and wind floods, creating a very diverse and unique landscape.

Basalt Floods Thousands of years ago there was

giant volcanic eruptions that caused for basalt floods that shaped the land of Pacific Northwest. These basalt floods can be seen in the land scape of central Washington.

Great Missoula Lake Floods Many years ago there was a

giant ice dam at Missoula Montana that blocked this giant lake of water. This dam broke multiple times and the water that came rushing through the Pacific Northwest shaped out many river cannels and other landforms of the area.

Wind Floods One flood that is still

shaping the landscape of the Pacific Northwest today is wind floods. Wind comes off of the Pacific coast and flows eastward shaping the land as it travels through the area.