Plug Domes
Untitled Document

 

Home Page
Browse Images
Geotripper's Blog
About Us
Feedback/Help
Links We Like!
Image Use
Page Template


Images of Plug Domes (Lava Domes)
Plug domes, or lava domes are usually small steep cones that form when highly viscous lavas like rhyolite and dacite are extruded out of the ground. Such lavas barely flow, if it all, and if they do, they form thick bulbous masses called coulees. Often the extreme viscosity prevents the lava from crystallizing at all, forming obsidian glass or the frothy equivalent, pumice. Most plug domes are small, usually less than a thousand feet tall, although California's most famous example, Lassen Peak, is twice as tall. A number of plug domes in California are less than a thousand years old, at Lassen Volcanic Park, on Medicine Lake Highland, and at the Inyo/Mono Craters east of the Sierra Nevada.
Lassen Peak from Bumpass Hell
 
Lassen Volcanic National Park: Lassen Peak and Chaos Crags
Lassen Volcanic National Park was established soon after the eruption of Lassen Peak from 1914-17. The park contains a wealth of volcanic features and landforms, including plug domes, small basaltic shields, cinder cones, and geothermal features. Brokeoff Mountain is part of Mt. Tehama, a stratovolcano that eroded away several hundred thousand years ago. Lassen Peak, which first erupted about 27,000 years ago, is likely the largest plug dome in the world. Nearby Chaos Crags are a series of seven lava domes that erupted only a thousand years ago.
Aerial view of Lassen Peak Aerial of Lassen Peak Aerial view of Lassen Peak Aerial view of Lassen Peak Aerial view of Lassen Peak Aerial view of Lassen Peak and Brokeoff Mtn
Aerial view of Lassen Peak Aerial view of Lassen Peak Aerial view of Lassen Peak Aerial view of Lassen Peak Aerial view of Lassen Peak and Brokeoff Mountain Aerial view of Lassen Peak and Brokeoff Mountain
Aerial view of Lassen Peak Aerial view of Lassen Peak Aerial view of Lassen Peak Aerial view of Lassen Peak showing features Aerial view of Lassen Peak
Aerial view of Lassen Peak with Chaos Crags on left, Brokeoff Mtn on right Aerial view of Lassen Peak with Chaos Crags on right Aerial view of Lassen Peak with Brokeoff Mtn on right Aerial view of Lassen Peak with Chaos Crags on left, Brokeoff Mtn on right Aerial view of Lassen Peak with Chaos Crags on left, Brokeoff Mtn on right (labeled) Aerial view of Lassen Peak with Chaos Crags on left, Brokeoff Mtn on right
Aerial view of Lassen Peak Aerial view of Lassen Peak Aerial view of Lassen Peak Lassen Peak from the Devastated Area Zoom on summit of Lassen Peak North slope of Lassen Peak from Devastated Area
Aerial view of Lassen Peak with Brokeoff Mtn on right Aerial view of Lassen Peak with Brokeoff Mtn on right Aerial view of Lassen Peak with Brokeoff Mtn on right Lassen Peak from the north, at the Devastated Area Lassen Peak from the north, at the Devastated Area, zooming on summit area Lassen Peak from the north, at the Devastated Area, zooming on summit area
Eruption of Lassen Peak Lassen Peak from Lake Helen Lassen from the south Lassen and Lake Helen Lassen and Lake Helen Lassen Peak from Bumpass Hell trail
I didn't take this! NPS photo of Lassen erupting in 1914 - photo by B.F. Loomis Lassen Peak from the south, near the Bumpass Hell trail, fall 2009 Lassen Peak from the south, near the Bumpass Hell trail Lassen Peak from the south, near the Bumpass Hell trail and Lake Helen Lassen Peak from the south, near the Bumpass Hell trail and Lake Helen Lassen Peak from the south, near the Bumpass Hell trail
Lassen from Bumpass Hell trail Lassen Peak and Chaos Crags from Hat Creek area Chaos Crags from the north Lassen Peak from Hat Creek area Lassen Peak from Hat Creek area Lassen Peak from Hat Creek area
Lassen Peak from the south, near the Bumpass Hell trail Lassen Peak and Chaos Crags from the Hat Creek area. Both mountains are plug domes Chaos Crags from the Hat Creek area Lassen Peak from the Hat Creek area in Fall 2007 Lassen Peak from Hat Creek area Lassen Peak from Hat Creek area
Lassen Peak and Chaos Crags from Hat Creek area Lassen Peak from Devastated Area Lassen Peak from Devastated Area Vulcans Eye from the Lassen Peak trail Chaos Crags and the Chaos Jumbles Lassen Peak and Helen Lake
Lassen Peak and Chaos Crags from Hat Creek area in Fall 2007 Lassen Peak from Devastated Area in Fall 2007 Lassen Peak from Devastated Area with early Fall snow Vulcans Eye from the Lassen Peak Trail Chaos Crags and Chaos Jumbles at Lassen Volcanic National Park. Lassen Peak and Helen Lake, Fall 2005
Lassen Peak in Fall 2005 Chaos Crags at Lassen National Park        
Lassen Peak from the south, Fall 2005 Chaos Crags near Lassen Peak, a series of plug domes erupted about 1,000 years ago        
Edge of Glass Mountain Flow, Medicine Lake Highland Glass Mountain on Medicine Lake Highland Edge of Glass Mountain flow Glass Mountain plug dome Glass Mountain coulee  
Glass Mountain is a very young plug dome composed of obsidian and pumice Glass Mountain, on the flank of Medicine Lake Highland, is only about 1,000 years old Edge of Glass Mountain flow, mostly rhyolite pumice and obsidian Glass Mountain plug dome on Medicine Lake Highland Coulee of Glass Mountain flow on side of Medicine Lake Highland  
Llao Rock, an exposed plug dome on rim of Crater Lake Mono Craters and Mono Lake Mono Craters and Mono Lake Mono Craters and Mono Lake    
Llao Rock, a former plug dome on rim of Crater Lake Mono Craters and Mono Lake in the Eastern Sierra Nevada. The Mono Craters range in age from 600 to about 35,000 years The Mono Craters are one of the most volcanically active areas in California    
Black Butte near Mt. Shasta Black Butte near Mt. Shasta Black Butte near Mt. Shasta      
Black Butte (6,334 ft) is a plug dome on the west flank of Mt. Shasta Black Butte near Mt. Shasta erupted between 9,000 and 10,000 years ago Black Butte is near Mt. Shasta is easily visible from Interstate 5. These views are from the Everitt Highway      
           
         

Home Page | Browse Images | Geotripper's Blog | About Us | Feedback/Help | Links We Like | Image Use |

© 2010 All rights reserved. Garry Hayes, 435 College Ave, Modesto, CA 95350.
Please send any comments or problems with this site here