North Andes plate
North Andes plate (note:outdated Nazca plate)
Type	Micro
Movement1	North-west
Speed1	23mm/year
Features	Colombia  Ecuador  Venezuela
1Relative to theAfrican plate

TheNorth Andes plate orNorth Andes block is a smalltectonic plate (microplate) located in the northernAndes. It is squeezed between the faster movingSouth American plate and theNazca plate to the southwest. Due to thesubduction of theCoiba andMalpelo plates, this area is very prone tovolcanic andseismic activity, with manyhistorical earthquakes.

The North Andes plate is bound by (clockwise from north):

1. Caribbean plate
2. South American plate
3. Malpelo plate – considered a part of theNazca plate before 2017^[1]
4. Coiba plate – considered a part of the Nazca plate before 2016^[2]
5. Panama plate

The Colombian part of the North Andes plate is subdivided into severalterranes:^[3]

Terranes belonging to the Colombian part of the North Andes plate

Abbr	Name	Age range	Paleomap	Basins	Complexes	Ranges	Departments	Comments	Notes
CHT	Chibcha	Mesoproterozoic		•Catatumbo •Cesar-Ranchería •Eastern Cordillera(Altiplano Cundiboyacense –Bogotá) •VMM •VSM	Ariarí,Garzón,Floresta,Quetame,Santander	Central,Eastern,Perijá,SNSM,San Lucas,La Macarena	Antioquia,Arauca,Bogotá,Bolívar,Boyacá,Caquetá,Casanare,Cesar,Cundinamarca,Huila,Magdalena,Meta,Putumayo,Norte de Santander,Santander,Tolima	Largest terrane,named after Chibcha	[4][5][6]
		Neoproterozoic
TA	Anacona	Devonian		none	Anacona	Central	Antioquia	Tiny terrane
		Carboniferous
TT	Tahamí	Permian		•Amagá •Cocinetas •VIM	Antioquia	Central,Macuira,SNSM	Antioquia,Bolívar,Caldas,Cauca,La Guajira,Magdalena,Nariño,Risaralda,Sucre,Valle del Cauca	Most extensive terrane
		Triassic
TAR	Arquía	Early Cretaceous		none	Arquía	Central	Antioquia,Caldas,Cauca,Nariño,Quindío,Risaralda,Valle del Cauca	Thinly banded terrane	[7][8][9]
TQ	Quebradagrande			none	Quebradagrande	Central	Antioquia,Caldas,Cauca,Nariño,Quindío,Risaralda,Valle del Cauca	Thinly banded terrane	[7][9][10] [11][12][13]
TC	Caribe	Late Cretaceous		•Cauca-Patía •Chocó •Sinú-San Jacinto •Tumaco •Urabá	Santa Cecilia-La Equis	Central,Western,Darién,Baudó,Montes de María	Antioquia,Atlántico,Caldas,Cauca,Chocó,Córdoba,Nariño,Quindío,Risaralda,Sucre,Valle del Cauca	El Totumo
TLG	La Guajira			•La Guajira	Etpana,Macuira	Macuira,SNSM	La Guajira,Magdalena	Tayrona,Cabo de la Vela

Subduction of the Coiba plate underneath the North Andes plate causes frequent earthquakes in theBucaramanga Nest, the most seismically active area in the world. TheBucaramanga-Santa Marta Fault stretches along the plate for more than 600 kilometers from north to south. The plate boundary with the South American plate is most tectonically active along a more than 900 kilometer long megaregionalfault system; theEastern Frontal Fault System.

This fault system, extending into Ecuador and Venezuela all along the northern Andes, separates the terranes from the North Andes plate from:^[3]

The accreted terranes of the North Andes plate represent a complex geologic history. There have been two instances of intra-oceanic arcs colliding with the continent. The first of these events, which took place ~90-65Ma, involved the subduction of an intra-oceanic arc beneath the South American/North Andes plate. This subduction led to margin-parallel strike slip motion and shortening across the entire region. The second major collision occurred approximately 12Ma, during the Miocene. This event involved closing a ~1200 km-wide middle Eocene seaway and docking the Panama arc with South America. This second collision event also accelerated strike-slip faulting along the North Andes margin. Reconstruction studies of the area illustrate the complex dynamics of the tectonically active North Andes plate margin.^[16]

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• Tectonic plates
• Geology of the Andes
• Geology of Colombia
• Geology of Ecuador
• Geology of Venezuela

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