The Precordillera Terrane or Cuyania was an ancient microcontinent or terrane whose history affected many of the older rocks of Cuyo in Argentina. It was separated by oceanic crust from the Chilenia terrane which accreted into it at ~420-390 Ma when Cuyania was already amalgamated with Gondwana.[1] The hypothesized Mejillonia Terrane in the coast of northern Chile is considered by some geologists to be a single block with Cuyania.
The San Rafael Block crops out 200 km to the south of the other exposures of Cuyania and is the southern extension of the terrane.[2]
The Precordillera has been hypothesised to have been derived from Laurentia, the core of North America, which was attached to the western margin of South America during the Precambrian when virtually all continents formed a "proto-Gondwana" supercontinent known as Pannotia. The Precordillera was then part of a proposed "Texas Plateau", a promontory attached to Laurentia similar to the way the Falkland Plateau is attached to South America today. The Texas Plateau was detached from the Gondwana in a rift around 455 Ma after which it collided with the proto-Andean margin of South America, an event known as the Taconic-Famatinian orogeny, and the Precordillera got left behind at its present location within South America.[3]
The Precordillera Terrane or Cuyania was an ancient microcontinent or terrane whose history affected many of the older rocks of Cuyo in 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. Andes –...
Gondwana scraped against southeast Laurentia in the Ordovician. This is the Cuyania or Precordillera terrane of the Famatinian orogeny in northwest Argentina...
accretion of many smaller land masses and island arcs. These include Chilenia, Cuyania, and Chaitenia, which now form much of Chile and Patagonia. These collisions...
rifting along Laurentia's southeastern margin led to the separation of Cuyania (now part of Argentina) from the Ouachita embayment with a new ocean established...
Arequipa-Antofalla Mejillones Peninsula Chilenia Chaitenia Chiloé Block Cuyania Pampia Patagonia Fitz Roy Madre de Dios Andes portal Geology portal v t...
amalgamated to the old cratons of the east, and was followed by the suturing of Cuyania and Chilenia terranes into the young South American Plate. Casquet, C;...
the Cuyania terrane would be an allochthonous block of Laurentian origin that was left in Gondwana. But such views are challenged since Cuyania is alternatively...
Neoproterozoic 550 Ma Cimmeria Neoproterozoic 550 Ma Laurasia Neoproterozoic 550 Ma Cuyania Paleozoic ~420-390 Ma Chilenia Paleozoic ~420-390 Ma Pangaea Paleozoic...
Rheic Ocean stretched between Gondwana and the microcontinent of Avalonia. Cuyania (northwest of today's Argentina) was located at low latitudes. Gondwana...
subduction went on, the peak of the orogeny resulted from the collision of the Cuyania terrane with Pampia in the Ordovician. It has been suggested that the coeval...
orogeny took place near the right border of the area marked as "Río Plata". Terranes and microcontinents such as Cuyania, Pampia and Chilenia are omitted....
tectonostratigraphic view, some geologists consider it an exposure of the Cuyania (Precordillera) terrane being its southern extension. The San Rafael Block...
(Darriwilian) linguliform and craniiform brachiopods from the Precordillera (Cuyania Terrane) of west-central Argentina". Journal of Paleontology. 90 (6): 1068–1080...
North American plate). The separation of the Precordillera (also named Cuyania) started around the early Cambrian. The mass collided with Gondwana (the...
Intermediate Depression. Geological history of the precordillera terrane Cuyania – Ancient microcontinent now part of Argentina "precordillera". Diccionario...
Ancient microcontinent, containing central Chile and western Argentina Cuyania – Ancient microcontinent now part of Argentina Laramidia – Island continent...
Geology of Chile Terranes Arequipa-Antofalla Chaitenia Chilenia Chiloé Cuyania Fitz Roy Madre de Dios Mejillonia Patagonia Sedimentary formations and...
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