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Volcanic Features
Volcanic Features
One unique feature of this beautiful National Park is the volcanic nature. Throughout history there have been many times where Mount Rainier has erupted and could very possibly again in the future. This is considered one of the most dangerous volcanos in the US due to its large size and past history.
Volcantic Formation
Volcantic Formation
As the Juan de Fuca plate sinks beneath the North American plate, the heat and pressure melts the plate. Then the magna rises into magma chambers. This magma is released by earthquakes and erupt onto the surface, caused by motion of the plate boundary.
Stratovolcano Definition
Stratovolcano Definition
Stratovolcano are volcanoes that are built up by layers of hardened lava flows, volcanic ash, and other sediments from previous eruptions. This structure is not only visually distinctive but also shows the explosive nature of Mount Rainier, as thick lava flows, and ash build up over time. Stratovolcanoes are known for their violent eruptions, and Mount Rainier’s large size and being a part of the cascade arc makes it one of the most active and studied volcanoes in North America.
Geothermic Features
Geothermic Features
These geothermal features are a direct result of the mountain's volcanic activity, and they offer insight into the inner workings of the Earth’s crust and volcanic activity. Here are the key geothermal features at Mount Rainier:
Lahars
Lahars
when the hot, pyroclastic debris mixes with the glaciers’ meltwater. These are often called sulfur springs
Fumaroles
Fumaroles
These release steam and volcanic gases, giving off heat and sulfurous odors. They are often called steam vents.
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