Coso volcanic field, USA

Schönbrunn Summer palace
Volcan Arenal (with lava)
Pyramid target
Coso volcanic field, Utah
Suggested by: Unknown

How cool is this: 2.902.902.902.902.90

A volcanic field in California? This is the proof that geology is much more fun on GE than in the classroom!
See it in Google Earth
Information on WikipediaRandom placemark

12345


Information about Coso volcanic field

The Coso Volcanic Field is located at the west edge of the Basin and Range province. Initiation of volcanism at Coso preceded the onset of Basin and Range crustal extension there, as expressed by normal faulting. The earlier of the two principal periods of volcanism began with the emplacement of basalt flows over a surface of little relief. Then, during the ensuing period of approximately 1.5 million years, eruptive activity included chemically more evolved rocks erupted upon a faulted terrain of substantial relief. Following a 1.5-million-year hiatus with few eruptions, a bimodal field of basalt lava flows and rhyolite lava domes and flows developed on Basin and Range terrain of essentially the same form as today's landscape. Many of the young basalt flows are intercanyon, occupying parts of the presentday drainage system.

The Coso Volcanic Field is best known for its Pleistocene rhyolite. Thirty-eight rhyolite domes and flows form an elongate array atop a north-trending 8 x 20-kilometer horst of Mesozoic bedrock. Nearby uneroded constructional forms are exhibited by most domes. Many are nested within tuff ring craters, and a few filled and overrode their craters to feed flows a kilometer or two long. The two oldest domes contain several percent phenocrysts; the rest are essentially aphyric. Obsidian is exposed locally on most extrusions, and analyses of fresh glass indicate that all of the rhyolite is of the so-called high-silica variety; SiO2 content is essentially constant at 77 percent. Other major-element constituents are nearly invariant. However, trace-element contents vary and help define 7 age groups, each of unique chemical composition.

This information was provided by Wikipedia under the GNU license. Read more about this placemark on Wikipedia.

Comments about Coso volcanic field

Comments(0) | Write comment


Related results:

Cotopaxi, Quito (grade 3.12 of 5)
Mount Fuji, Honshu (grade 3.82 of 5)
Waw an namus, Libya (grade 3.43 of 5)
Volcan Arenal (with lava), Arenal (grade 3.16 of 5)
Volcan de Colima, Colima (grade 3.71 of 5)

Some random placemarks in USA

FlyinFlyin' and livin' place, San Antonio, TX (grade 3.11 of 5)
Apple HeadquartersApple Headquarters, California (grade 3.29 of 5)
Pyramid targetPyramid target, Nevada (grade 4.13 of 5)
Glen canyon damGlen canyon dam, Arizona (grade 3.92 of 5)
Hoover DamHoover Dam, Nevada (grade 3.85 of 5)
ICBM Missile launch sitesICBM Missile launch sites, Washington (grade 3.29 of 5)
Military airforceMilitary airforce, Nevada (grade 3.16 of 5)
Kennecott copper mineKennecott copper mine, Utah (grade 3.58 of 5)
Cadillac RanchCadillac Ranch, Amarillo, TX (grade 3.00 of 5)
strange treestrange tree, Near area 51 (grade 2.17 of 5)

Five completely random placemarks from the database

Poco de CaldasPoco de Caldas, Brazil (grade 2.56 of 5)
Military airforceMilitary airforce, Nevada (grade 3.16 of 5)
Surf waves on baliSurf waves on bali, Bali (grade 2.69 of 5)
The forbidden cityThe forbidden city, Beijing (grade 3.94 of 5)
Spaghetti bridgeSpaghetti bridge, somewhere in arizona (grade 3.27 of 5)