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The Geology of Seattle

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The Geology of Seattle
The Geology of Seattle

Seattle is located in the state of Washington in the Pacific Northwest. Seattle is metropolitan and has a population of nearly 3.5 million. Seattle’s climate changes from wet and cold during the winter months to dry and hot during the summer months. The coast of Seattle is responsible for the growth of its economy, due to the large number of commercial ports. Seattle is in the destructive range of several volcanos within Washington, most prominently, Mt. Rainier.

Topography

Seattle is surrounded by large bodies of water and mountainous terrain. The city itself lies on top of several hills, which include; Capitol Hill, Second Hill, Denny Hill, Beacon Hill, and Queen Anne Hill. From the center of Seattle you can find shoreline to the north, Bainbridge Island to the north-west, The Puget Sound to the west, Vashon Island to the south-west, Tukwila to the south, Renton to the south-east, Lake Mercer to the East, and Lake Forest Park to the north-east. Past the Puget Sound lie the Olympic Mountains. Seattle owes its specific structure due to glacial scouring and deposition and tectonic activity, subsequently modified by landsliding, stream erosion and deposition, and human activity.

Geological hazards

Seattle is threatened by several geological hazards, such as earthquakes, flooding, volcanos and landslides and shore erosion. Perhaps one of the most prominent hazards to Seattle is the Massive volcano, MT. Rainier, which lies 54 miles southeast of Seattle. MT. Rainier stands at an elevation of 14,411 feet and is very topographically prominent. Rainier is considered one of the world’s most dangerous volcanos. The composition of Rainier is very andesitic and upon it eruption could cause a violent explosion. The glacial ice that sits atop the mountain can also cause massive lahars that could cause major damage to Seattle’s infrastructure as well as its economy.

Although MT. Rainier displays no signs of imminent eruption, it has



Bibliography: * http://www.seattleweekly.com/2005-10-19/news/the-super-flood.php/ * “Geological Hazards In Seattle” by Donald W. Tubbs and Thomas Dunne * ”Landslides In Seattle” by Donald W. Tubbs Prepared in cooperation with United States Geological Survey 1974 * “Coal In The Puget Sound Region” HistoryLink.org Essay 5158 * http://www.nps.gov/mora/faqs.htm

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