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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 ...
An example of using thermal modeling in P-T-t path reconstruction. The above diagram shows the calculated geothermal gradients upon crustal thickening at 0 million year (m.y.) followed by an immediate uplift event at a rate of 1 mm per year. The P-T-t evolution of a rock originally at 40 km below ground is marked as red dots on the diagram.
Diagram (modified from Fig 3.11 in Irwin, 1990) showing the depositional setting of the Franciscan Assemblage and the contemporaneous Great Valley Sequence,. [ 5 ] The Franciscan Complex is an assemblage of metamorphosed and deformed rocks, associated with east-dipping subduction zone at the western coast of North America. [ 6 ]
The Yakutat Terrane is currently colliding with the continental margin below the central Gulf of Alaska. During the Neogene the terrane's western part was subducted after which a sediment wedge accreted along the northeast Aleutian Trench. This wedge incorporates sediment eroded from the continental margin and marine sediments carried into the ...
The Keryneia Terrane occupies the northern margin of Cyprus, stretching from Cape Kormakitis in the west to Cape Andreas in the east. The terrane is a sequence of Permian to recent sediments. [3] The carbonate rocks are divided into the Dhikomo, the Hilarion and the Sykhari Formation. [3]
Chilenia was an ancient microcontinent or terrane whose history affected many of the older rocks of central Chile and western Argentina.It was once separated by oceanic crust from the Cuyania terrane to which it accreted at ~420-390 Ma when Cuyania was already amalgamated with Gondwana.
The Meguma terrane, also known as Megumia, is a terrane exposed in southern Nova Scotia, that became joined to the present North American landmass as part of the Appalachian orogeny. The exposed part of the Meguma terrane, the Meguma Group , is largely composed of c. 10 km (6.2 mi) thick Cambrian to Ordovician turbidites that have been ...
The Irish Grampian terrane is the continuation of Grampian terrane in Scotland. It is composed of the Dalradian Supergroup and its gneiss basement which was affected by the Grampian orogeny. These rocks responded to Acadian deformation relatively rigidly and their main deformation was a NE–SW trending ductile sinistral shear zone in the ...