Author: Arizona Geological SocietyPublisher:
ISBN:
Category : Geology
Languages : en
Pages :
Book Description
Arizona Geological Society 1992 Fall Field Trip
Author: Arizona Geological SocietyPublisher:
ISBN:
Category : Geology
Languages : en
Pages :
Book Description
Industrial Minerals of the Tucson Area and San Pedro Valley, Southeastern Arizona
Author: Arizona Geological SocietyPublisher:
ISBN:
Category : Geology
Languages : en
Pages : 55
Book Description
Geological Survey Circular
Author: U.S. Geological Survey Circular
Author: Miocene Tectonics of the Lake Mead Region, Central Basin and Range
Author: Paul John UmhoeferPublisher: Geological Society of America
ISBN: 0813724635
Category : Science
Languages : en
Pages : 456
Book Description
Accompanying CD-ROM titled: Supplementary materials to Miocene tectonics of the Lake Mead region, central basin and range.
U.S. Geological Survey Bulletin
Author: New Mexico's Ice Ages
Author: Spencer G. LucasPublisher: New Mexico Museum of Natural History and Science
ISBN:
Category : Geology, Stratigraphic
Languages : en
Pages : 286
Book Description
The Mojave-Sonora Megashear Hypothesis
Author: Thomas Howard AndersonPublisher: Geological Society of America
ISBN: 0813723930
Category : Science
Languages : en
Pages : 726
Book Description
U.S. Geological Survey Bulletin
Author: Ed DeWittPublisher:
ISBN:
Category : Argon-argon dating
Languages : en
Pages : 402
Book Description
Did Westward Subduction Cause Cretaceous-Tertiary Orogeny in the North American Cordillera?
Author: Robert S. HildebrandPublisher: Geological Society of America
ISBN: 0813724570
Category : Science
Languages : en
Pages : 80
Book Description
Within the Sonora segment to the south, break-off magmatism was also prevalent. Both the Canadian and Sonoran segments have abundant porphyry copper mineralization temporally and spatially associated with the break-off magmas, which suggests a genetic link between slab failure and porphyry copper mineralization. By 53 Ma, eastwardly dipping subduction of Pacific Ocean crust was generating arc magmatism on the amalgamated Cordilleran collision zone in both the Canadian and Sonoran segments. Oceanic schists, such as the Orocopia-Pelona-Rand, were formed in the ocean basin west of Rubia and accreted during initiation of the new easterly dipping subduction zone. A major transform fault, called the Phoenix fault, connects the Sevier fold-thrust belt at the California-Nevada border with that in eastern Mexico and separates the Great Basin and Sonoran segments. It juxtaposes the Sierra-Mojave-Sonora block alongside the Transition Zone of the Colorado Plateau. Cordilleran events affected the subsequent development of western North America. For example, the structural Basin and Range Province appears to coincide with the region where exotic allochthons sit atop North American crust in both the Great Basin and Sonoran segments. Also, within the triangular Columbia embayment, large segments of Rubia appear to have escaped laterally during the Cordilleran orogeny to create a lithospheric "hole" that was later filled by basalt of the Columbia River and Modoc plateaux.