|
The Potrillo volcanic field is a monogenetic volcanic field located on the Rio Grande Rift, in a portion of its rift valley, in southern New Mexico, United States and northern Chihuahua, Mexico. The volcanic field lies southwest of Las Cruces, New Mexico.〔 == Rio Grande rift == (詳細はRio Grande rift is a north–south rift valley in the Basin and Range Province of western North America. * Rifting began in Late Oligocene epoch. * The Rio Grande rift begins in central Colorado and runs southward to end in the state of Chihuahua, Mexico. * Due to the rollback of Farallon Plate, a temporal pattern of magmatism oldest in east and swept progressively westward * Mantle upwelling providing heat and extension. * Gravitational collapse due to crustal thickening of the subduction zone, with deformation occurring as far west as Death Valley, California. * Collapse extension of the Basin and Range and the Rio Grande rift continues even today, although at a reduced rate compared to the Oligocene and the Miocene. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Potrillo volcanic field」の詳細全文を読む スポンサード リンク
|