YELLOWSTONE  NATIONAL  PARK

(photos from the textbook CD)

 

http://www1.newark.ohio-state.edu/Professional/OSU/Faculty/jstjohn/Geology%20105/Yellowstone/Yellowstone1.jpg

Yellowstone Hotspot - the Yellowstone Caldera and surrounding areas are heavily forested mountainous areas

 

 

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Yellowstone Hotspot - a considerable percentage of Yellowstone’s forests was allowed to burn in the late 1980s.  The devastation is readily seen throughout the park today, over two decades later.

 

 

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Grand Canyon of the Yellowstone - hydrothermally metamorphosed rocks exposed in a rocky gorge along the Yellowstone River.  Superheated groundwater is common in the area, which hydrothermally alters bedrock.

 

 

http://www1.newark.ohio-state.edu/Professional/OSU/Faculty/jstjohn/Geology%20105/Yellowstone/Grand-Canyon-of-the-Yellowstone2.jpg

Grand Canyon of the Yellowstone - hydrothermally metamorphosed rocks exposed in a rocky gorge along the Yellowstone River.

 

 

http://www1.newark.ohio-state.edu/Professional/OSU/Faculty/jstjohn/Geology%20105/Yellowstone/Grand-Canyon-of-the-Yellowstone3.jpg

Grand Canyon of the Yellowstone - hydrothermally metamorphosed rocks exposed in a rocky gorge along the Yellowstone River.

 

 

 

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Obsidian Cliff - Pleistocene-aged obsidian and snowflake obsidian (partially devitrified obsidian with spots of whitish cristobalite crystals) of the Roaring Mountain Member of the Plateau Rhyolite.

 

 

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Hot spring in the Yellowstone Hotspot.

 

 

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Mammoth Hot Springs and whitish terraces of travertine (calcitic hot spring deposits).

 

 

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Mudpot in Yellowstone Hotspot.

 

 

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Old Faithful Geyser in the Yellowstone Hotspot.

 

 

http://www1.newark.ohio-state.edu/Professional/OSU/Faculty/jstjohn/Geology%20105/Yellowstone/Geyserite-cone1.jpg

Travertine cone at Mammoth Hot Springs, in the northwestern part of Yellowstone Park.  Most hot springs and geysers at Yellowstone deposit siliceous sinter (geyser-deposited siliceous sinter is called geyserite).  At Mammoth Hot Springs, travertine is deposited.  Travertine is composed of CaCO3 (calcite).  Most cave speleothem is also composed of travertine.

 

 

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