1
Super-Volcanoes, Part 2: La Garita
Super-Volcanoes, Part 2: La Garita
DATE: 2011/02/16::
2
List of Super Volcanoes
List of Super Volcanoes
DATE: 2014/08/25::
3
La Garita Caldera.wmv
La Garita Caldera.wmv
DATE: 2010/02/16::
4
Super Volcanic Eruption
Super Volcanic Eruption
DATE: 2015/01/13::
5
Vulkanausbrüche || vulcanoes eruptions 2
Vulkanausbrüche || vulcanoes eruptions 2
DATE: 2013/07/22::
6
Vulkanausbrüche  || Vulcanoes eruptions
Vulkanausbrüche || Vulcanoes eruptions
DATE: 2013/07/22::
7
SUPERVOLCANES
SUPERVOLCANES
DATE: 2013/01/07::
8
ID 1016. Beautiful house in La Garita
ID 1016. Beautiful house in La Garita
DATE: 2013/03/26::
9
Supervolcanoes Around The World.
Supervolcanoes Around The World.
DATE: 2011/10/06::
10
Igneous rocks of Colorado. Cross sections showing different kinds of igneous intrusions.
Igneous rocks of Colorado. Cross sections showing different kinds of igneous intrusions.
DATE: 2013/11/04::
11
Casa en venta en Boquete - Urb. Montañas de Caldera. Chiriquí. Prestige Panama Realty. 6981.5000
Casa en venta en Boquete - Urb. Montañas de Caldera. Chiriquí. Prestige Panama Realty. 6981.5000
DATE: 2013/12/07::
12
Super-Volcanoes, Part 3: Long Valley Caldera
Super-Volcanoes, Part 3: Long Valley Caldera
DATE: 2011/02/17::
13
Buceando con Nerea, Jon,  Basileo  y Ordoño
Buceando con Nerea, Jon, Basileo y Ordoño
DATE: 2010/06/22::
14
Costanera el Jueves 04 Febrero 2010
Costanera el Jueves 04 Febrero 2010
DATE: 2010/02/05::
15
The King Ludwig Train Trix H0 21231 DCC(Argentina)
The King Ludwig Train Trix H0 21231 DCC(Argentina)
DATE: 2011/12/06::
16
la caldera abasolo gto
la caldera abasolo gto
DATE: 2013/08/29::
17
LA GARITA Alajuela Farm with 4 Homes For Sale
LA GARITA Alajuela Farm with 4 Homes For Sale
DATE: 2014/02/26::
18
Stan Deyo: Yellowstone Caldera More Active Than Previously Thought
Stan Deyo: Yellowstone Caldera More Active Than Previously Thought
DATE: 2014/04/11::
19
Long Valley Caldera
Long Valley Caldera
DATE: 2015/02/18::
20
Costa Rica Real Estate - Open floor plan home -- ultracontempory -- 4be/4,5 ba
Costa Rica Real Estate - Open floor plan home -- ultracontempory -- 4be/4,5 ba
DATE: 2014/06/27::
21
Balneario "La Caldera" , Abasolo, Gto. Mex.
Balneario "La Caldera" , Abasolo, Gto. Mex.
DATE: 2010/04/02::
22
Volcanolgy and the Long Valley Caldera
Volcanolgy and the Long Valley Caldera
DATE: 2009/07/14::
23
Claire
Claire's Geology Brief No. 17: A Giant Volcanic Caldera
DATE: 2014/05/02::
24
LONG VALLEY CALDERA SUPERVOLCANO
LONG VALLEY CALDERA SUPERVOLCANO
DATE: 2014/07/13::
25
La Caldera Abasolo Guanajuato
La Caldera Abasolo Guanajuato
DATE: 2010/08/05::
26
La Caldera Abasolo Gto.
La Caldera Abasolo Gto.
DATE: 2010/03/01::
27
Costa de Telde, playas de: La Garita, Hoya del Pozo, del Hombre, Melena y Salinetas.ra
Costa de Telde, playas de: La Garita, Hoya del Pozo, del Hombre, Melena y Salinetas.ra
DATE: 2014/06/23::
28
VALLES CALDERA SUPERVOLCANO New Mexico
VALLES CALDERA SUPERVOLCANO New Mexico
DATE: 2014/06/30::
29
Info&Promo Abasolo Gto La Caldera
Info&Promo Abasolo Gto La Caldera
DATE: 2013/01/18::
30
La Garita
La Garita
DATE: 2012/11/17::
31
LA GARITA Line Dance (Choreographed by Luca Bertarelli)
LA GARITA Line Dance (Choreographed by Luca Bertarelli)
DATE: 2013/05/21::
32
1 minuto en El Bufadero de La Garita.
1 minuto en El Bufadero de La Garita.
DATE: 2012/12/22::
33
La Caldera, Abasolo Guanajuato
La Caldera, Abasolo Guanajuato
DATE: 2010/08/03::
34
Abasolo Balnearios Gruta La garita
Abasolo Balnearios Gruta La garita
DATE: 2010/06/05::
35
Entrevista Protección Civil Alto Oleaje Playa Garita Palmera Material En Desarollo
Entrevista Protección Civil Alto Oleaje Playa Garita Palmera Material En Desarollo
DATE: 2015/05/02::
36
Precioso Piso en Venta en Palma de Mallorca delante el Portixol.
Precioso Piso en Venta en Palma de Mallorca delante el Portixol.
DATE: 2012/03/24::
37
torre avenida ANACAONA republica dominicana
torre avenida ANACAONA republica dominicana
DATE: 2012/02/04::
38
La Caldera Abasolo Gto.
La Caldera Abasolo Gto.
DATE: 2010/03/07::
39
Supervolcanoes.Toba Lake,Yellowstone Caldera,Long Valley and Taupo Lake.
Supervolcanoes.Toba Lake,Yellowstone Caldera,Long Valley and Taupo Lake.
DATE: 2011/10/04::
40
Caldera Promotions Dia Calificaciones - Accidente
Caldera Promotions Dia Calificaciones - Accidente
DATE: 2011/11/20::
41
Los Tigres Del Norte - R-Uno - Corridos Prohibidos - Los Mas Perrones - Viejitos
Los Tigres Del Norte - R-Uno - Corridos Prohibidos - Los Mas Perrones - Viejitos
DATE: 2014/06/28::
42
1 minuto en la playa de La Garita, Telde
1 minuto en la playa de La Garita, Telde
DATE: 2013/08/04::
43
BALNEARIO LA CALDERA  ABASOLO (salven a pina)
BALNEARIO LA CALDERA ABASOLO (salven a pina)
DATE: 2010/01/14::
44
Spanish Style Estate Villa in La Garita
Spanish Style Estate Villa in La Garita
DATE: 2011/09/16::
45
COSTA RICA, VISTA DESDE RESTAURANTE LAS DELICIAS DEL MAIZ
COSTA RICA, VISTA DESDE RESTAURANTE LAS DELICIAS DEL MAIZ
DATE: 2012/09/19::
46
La Pauta - Elenkow, Cronos, Revol, Crunk & Jayboss "La Garita RECORD
La Pauta - Elenkow, Cronos, Revol, Crunk & Jayboss "La Garita RECORD'S"
DATE: 2012/03/22::
47
DRIVING THROUGH THE VALLES CALDERA FROM LOS ALAMOS TO JEMEZ SPRINGS, NEW MEXICO
DRIVING THROUGH THE VALLES CALDERA FROM LOS ALAMOS TO JEMEZ SPRINGS, NEW MEXICO
DATE: 2015/02/22::
48
Walk Caldera Blanca in Lanzarote
Walk Caldera Blanca in Lanzarote
DATE: 2012/01/19::
49
Time Lapse El Bufadero de La Garita Telde Gran Canaria
Time Lapse El Bufadero de La Garita Telde Gran Canaria
DATE: 2015/01/16::
50
La Garita Colorado Property
La Garita Colorado Property
DATE: 2012/12/17::
NEXT >>
RESULTS [51 .. 101]
From Wikipedia, the free encyclopedia
Jump to: navigation, search
La Garita Caldera
WheelerGACO.jpg
Ash formations of La Garita Caldera, looking northeast. (Wheeler Geologic Monument)
Location
La Garita Caldera is located in Colorado
La Garita Caldera
La Garita Caldera
Location of La Garita Caldera within Colorado
Location Mineral County, Colorado, US, near Creede
Range San Juan Mountains
Coordinates 37°45′23″N 106°56′03″W / 37.75639°N 106.93417°W / 37.75639; -106.93417Coordinates: 37°45′23″N 106°56′03″W / 37.75639°N 106.93417°W / 37.75639; -106.93417
Geology
Type Caldera
Last eruption 26.3 Ma (Fish Canyon Tuff 27.8 Ma)

La Garita Caldera is a large volcanic caldera located in the San Juan volcanic field in the San Juan Mountains near the town of Creede in southwestern Colorado, United States.[1] It lies to the west of the town of La Garita, Colorado. The eruption that created the La Garita Caldera is the largest known explosive eruption in Earth's history.[2]

Date[edit]

The La Garita Caldera is one of a number of calderas that formed during a massive ignimbrite flare-up in Colorado, Utah and Nevada from 40–25 million years ago, and was the site of massive eruptions about 26-28 million years ago, during the Oligocene Epoch.

Province[edit]

The area devastated by the La Garita eruption is thought[by whom?] to have covered a significant portion of what is now Colorado, and some research suggests the aerial extent may be as far as the east coast of North America and the Caribbean.[citation needed]

Size of eruption[edit]

The scale of La Garita volcanism was the greatest of the Cenozoic Era. The resulting deposit, known as the Fish Canyon Tuff, has a volume of approximately 1,200 cubic miles (5,000 km3), rating it an 8 on the Volcanic Explosivity Index. This is enough material to fill Lake Michigan. By comparison, the May 18, 1980 eruption of Mt. St. Helens was only 0.25 cubic miles (1.0 km3) in volume. The eruption was energetically equivalent to up to 250,000 megatons of TNT.[citation needed]

By contrast, the most powerful human-made explosive device ever detonated, the Tsar Bomba or King of the Bombs, had a yield of 50 megatons, whereas the eruption at La Garita was about 5,000 times more energetic. However, because Tsar Bomba's reaction was complete within microseconds, while a volcanic explosion can take seconds or minutes, the power of the events are comparable if measured within the bounded respective timeframes. It is the most energetic event to have taken place on Earth since the Chicxulub impact, which was 400 times more powerful than La Garita.

Geology[edit]

The Fish Canyon Tuff, made of dacite, is uniform in its petrological composition and forms a single cooling unit despite the huge volume. Dacite is a silicic volcanic rock common in explosive eruptions, lava domes and short thick lava flows. There are also large intracaldera lavas composed of andesite, a volcanic rock compositionally intermediate between basalt (poor in silica content) and dacite (higher silica content) in the La Garita Caldera.

The caldera itself, like the eruption of Fish Canyon Tuff, is quite large in scale. It is 35 by 75 kilometers (22 by 47 mi) oblong shape . Most supervolcano calderas of explosive origin are slightly ovoid or oblong in shape. Because of the vast scale and erosion, it took scientists over 30 years to fully determine the size of the caldera. La Garita can be considered a "supervolcano", albeit an extinct one.

La Garita is also the source of at least 7 major eruptions of welded tuff deposits over a time span of 1.5 million years since the Fish Canyon Tuff eruption. The caldera is also known to have extensive outcrops of a very unusual lava-like rock made of dacite that is very similar to that of the Fish Canyon Tuff. This rock, which has characteristics of both lava and welded tuff, was erupted probably shortly before the Fish Canyon Tuff. The lava-like rock has been interpreted as having erupted as thick spatter during low-energy lava fountaining. The lava-like rock is also voluminous — up to 200–300 cubic kilometers (48–72 cu mi).

See also[edit]

References[edit]

  1. ^ Steven, Thomas A.; Lipman, Peter W. (1976). "Calderas of the San Juan Volcanic Field, Southwestern Colorado". U.S. Geological Survey Professional Papers (Washington, DC: U.S. Government Printing Office) 958: 1–35. Retrieved 2012-05-16. 
  2. ^ "What's the Biggest Volcanic Eruption Ever?". livescience.com. November 10, 2010. Retrieved 2014-02-01. 

Bibliography[edit]

External links[edit]

Wikipedia content is licensed under the GFDL License
Powered by YouTube
MASHPEDIA
LEGAL
  • Mashpedia © 2015