A Walk Along a Geologic Timeline #4 - California
Posted by: 
Volcanoguy
N 40° 26.251 W 121° 32.018
10T E 624368 N 4477351
Rock display at Kohm Yah-mah-nee Visitor Center.
Waymark Code: WMJR71
Location: California, United States
Date Posted: 12/22/2013
Views: 2
One of four large volcanic boulders around the Kohm Yah-mah-nee Visitor Center near the south entrance to Lassen Volcanic National Park.
Text of display sign:
Cinder Cone Volcano and the Fantastic Lava Beds
This basaltic andesite boulder was created about 350 years ago, during the formation of Cinder Cone Volcano. Cinder cones form when blobs of gas-charged lava explode from a volcano’s vent, then fall back to earth as cooled fragments of rock.
Cinder Cone volcano, in the park’s northeast corner, first erupted about 1650 AD. Ash deposits from its eruptions are still found eight to ten miles away. Repeated basalt flows from Cinder Cone volcano, elevation 6,907 feet (2105 m), reached Butte Lake and dammed up Butte Creek, creating Snag Lake.
Colorful pieces of an earlier volcano were carried away by Cinder Cone’s lava flows and can be found in the Fantastic Lava Beds and Painted Dunes lava fields.
Type of Display: Geological
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