Search results
Results from the WOW.Com Content Network
The Wrangellia terrane (named for the Wrangell Mountains, Alaska) is a crustal fragment extending from the south-central part of Alaska and along the Coast of British Columbia in Canada. Some geologists contend that Wrangellia extends southward to Oregon , [ 1 ] although this is not generally accepted.
An abyssal plain is an underwater plain on the deep ocean floor, usually found at depths between 3,000 meters (9,800 ft) and 6,000 meters (20,000 ft).Lying generally between the foot of a continental rise and a mid-ocean ridge, abyssal plains are among the flattest, smoothest and least explored regions on Earth. [1]
There are two main terranes—Wrangellia and the Alexander—and a few smaller ones such as the Pacific Rim terrane. Because the Insular Belt is the most tectonically active of the belts, it has the greatest relief differences from the depths of the Queen Charlotte Sound to the heights of the Wrangell – Saint Elias Mountains .
Stikinia (in blue) at 330, 269, and 251 Ma, or before the breakup of Pangaea. At 269 Ma Stikinia is accompanied by the Wrangellia and Alexander terranes (west) and the East Klamath terrane (southeast). View centred on 60th meridian west.
The Cache Creek terrane is near the center and is the remains of oceanic crust, in the form of basalt, argillite, chert, gabbro, various ultramafic rocks and limestone dating from the Pennsylvanian to the Jurassic. The Yukon-Tanana and Slide Mountain terranes accreted between the Devonian and the Triassic. The Snowcap Assemblage metamorphosed ...
Wrangellia Terrane; Wrekin Terrane; Y. Yakutat Block; Yukon–Tanana Terrane This page was last edited on 30 May 2015, at 22:36 (UTC). Text is available under the ...
This week, the surname Mangione became associated with the killing of health-insurance executive Brian Thompson in New York City, when 26-year-old Luigi Mangione was charged with his murder.
Based on radiometric dating of a dike that cuts fault rock associated with the Totschunda Fault to about 114 million years ago, the fault zone was initiated during the latter part of the Early Cretaceous, associated with the accretion of the Wrangellia Terrane. [2]