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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 ...
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Geologic map depicting the Smartville Complex (in brown) and other accreted terranes in California. [1]The Smartville Block, also called the Smartville Ophiolite, Smartville Complex, or Smartville Intrusive Complex, is a geologic terrane formed in the ocean from a volcanic island arc that was accreted onto the North American Plate during the late Jurassic (~160–150 million years ago).
Proto-Alps Terrane; Rhenohercynian plate – Fold belt of west and central Europe, formed during the Hercynian orogeny; Sarmatian Craton – The southern part of the East European Craton or Baltica, also known as Scythian Plateau; Saxothuringian plate – Structural or tectonic zone in the Hercynian or Variscan orogen of central and western Europe
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 ]
[17] [18] The Wyoming craton can be differentiated from other Archean terranes by an enriched 207 Pb/ 204 Pb ratio that is hypothesized to represent early crustal extraction, as well as samarium and neodymium ratios providing rock ages of up to 4.0 Ga. [14] Investigation of lead and neodymium isotope ratios in the Grouse Creek block provide ...
The Torlesse Composite Terrane is a plate tectonic terrane forming part of the South Island of New Zealand. It contains the Rakaia, Aspiring and Pahau Terranes and the Esk Head Belt. [ 1 ] Greywacke (or Torlesse Greywacke ) is the dominant rock type of the composite terrane; argillite is less common and there are minor basalt occurrences.
The Hebridean Terrane forms the westernmost strip of mainland Scotland, most of the Inner Hebrides and all of the Outer Hebrides.Similar rocks are also thought to be present in Shetland and have been proved west and north of the Outer Hebrides by BGS shallow boreholes and hydrocarbon exploration wells.