09
Sep
North American Craton Rift. The North American Cordillera extends up and down the coast of North America and roughly from the Great Plains westward to the Pacific Ocean narrowing somewhat from north to south. The WCMB is most likely separated from the deformed and active southwestern part of the North American Proterozoic craton by repeated thermotectonic activities within the surrounding mobile belts. The subsurface of the central North American Craton has been imaged by body- surface- and full-waveform studies at varying resolutions. The 11Ga Midcontinent Rift MCR the 3000 km long largely buried feature causing the largest gravity and magnetic anomaly within the North American craton is traditionally considered a failed rift formed by isolated midplate volcanism and extension.
White arrow shows direction of North American plate edge of the craton is approximately along the OregonIdaho Border triangles are Cascades volcanoes. The Rio Grande Rift is a series of rift valleys along faults in the Southwestern United States. Rio Grande rift The Rio Grande rift is a north-trending continental rift zone. This animation shows the plate tectonic and paleogeographic evolution of North America from 200 million years ago to the present-day. The Brothers Fault Zone is also the locus of the High Lava Plains HLP volcanism of central and southeastern Oregon. The Rio Grande Rift stretches from central Colorado to the Mexican state of Chihuahua.
In other words the 11Ga Midcontinent Rift MCR the 3000 km long largely buried feature causing the largest gravity and magnetic anomaly within the North American craton and traditionally considered a failed rift formed by isolated midplate volcanism and extension formed as part of the rifting of Amazonia Precambrian northeast South America from Laurentia Precambrian North America.
The rift zone consists of four basins that have an average width of 50 kilometers. The rift zone consists of four basins that have an average width of 50 kilometers. The Rocky Mountains are sometimes excluded from the cordillera proper in spite of their tectonic history. North America was orig. The Rio Grande Rift separates the Colorado Plateau which is generally moving in a clockwise direction from the older part craton of the North American plate. These events have helped to dislocate and transport the block to its present location through processes of repeated compression extension and transform faulting.