Search results
Results from the WOW.Com Content Network
In geology, a terrane (/ t ə ˈ r eɪ n, ˈ t ɛr eɪ n /; [1] [2] in full, a tectonostratigraphic terrane) is a crust fragment formed on a tectonic plate (or broken off from it) and accreted or "sutured" to crust lying on another plate. The crustal block or fragment preserves its distinctive geologic history, which is different from the ...
The Wrekin Terrane is bounded to the west by the Welsh Borderland Fault System and to the east by the Malvern Lineament. The geological terrane to the west is the Cymru Terrane and to the east is Charnwood Terrane. [1] The majority of rocks in the area are associated with the outcrops that are evident at the faulted boundaries. [2]
The Central Highlands terrane in Scotland, also known as the Grampian terrane, is a sequence of early Paleozoic metamorphic rocks containing many igneous intrusions. It stretches from the Great Glen Fault, south-east down to the Highland Boundary. The terrane contains mostly gabbro and gneiss that show intrusions of granite and dolerite.
The Yukon–Tanana terrane (YTT) is a tectonic terrane that extends from central Alaska through central Yukon and into northern British Columbia, Canada and Southeast Alaska, USA. Extending over 2000 km, the YTT is the largest tectonostratigraphic terrane in the northern North American Cordillera . [ 1 ]
The Hunic superterrane is a terrane that is now attached to Europe and Asia. At the end of the Ordovician or beginning of the Silurian it separated from Gondwana and joined Laurasia at the beginning of the Carboniferous, at the time of the Variscan orogeny. Rather than being a single block, there were apparently two groups of blocks, the ...
The Lhasa terrane is the farthest south of these terranes. [3] The Lhasa terrane moved northward and collided with the Qiangtang terrane along the Banggongco-Nujiang Suture. [6] [7] The collision began towards the end of the late Jurassic (c. 163–145 Ma), and collision activity continued until the early Late Cretaceous (c. 100–66) Ma .
The geological terrane to the west is the Monian Composite terrane and to the east is Wrekin terrane. [1] The majority of rocks in the area are associated with the outcrops that are evident at the faulted boundaries. [2] [3] The Proterozoic rocks of the Cymru terrane are typified in North Wales by the Arfon Group, Sarn Complex and the Twt Hill ...
The Cache Creek terrane (alternately known as Cache Creek Melange) [1] is a geologic terrane in British Columbia and southern Yukon, Canada. The Cache Creek Terrane consists of Carboniferous to Lower Jurassic volcanic rocks , carbonate rocks , coarse clastic rocks and small amounts of ultramafic rock , chert and argillite .