North Andes Plate
The North Andes Plate or North Andes Block is a small tectonic plate located in the northern Andes. It is squeezed between the faster moving South American Plate and the Nazca Plate to the southwest. Due to the subduction of the Malpelo and Coiba Plates, this area is very prone to volcanic and seismic activity, with many historic earthquakes.
Boundaries
The North Andes Plate is bound by :- Caribbean Plate
- South American Plate
- Malpelo Plate
- Coiba Plate
- Panama Plate
Terranes
| Abbr | Name | Age range | Paleomap | :Category:Sedimentary basins of Colombia|Basins | Complexes | Ranges | Departments | Comments | Notes |
| CHT | Chibcha | Mesoproterozoic | • Catatumbo • Cesar-Ranchería • Eastern Cordillera • 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 | ||
| CHT | Chibcha | Neoproterozoic | • Catatumbo • Cesar-Ranchería • Eastern Cordillera • 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 | ||
| TA | Anacona | Devonian | none | Anacona | Central | Antioquia | Tiny terrane | ||
| TA | Anacona | Carboniferous | none | Anacona | Central | Antioquia | Tiny terrane | ||
| 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 | ||
| TT | Tahamí | Triassic | • Amagá • Cocinetas • VIM | Antioquia | Central, Macuira, SNSM | Antioquia, Bolívar, Caldas, Cauca, La Guajira, Magdalena, Nariño, Risaralda, Sucre, Valle del Cauca | Most extensive terrane | ||
| TAR | Arquía | Early Cretaceous | none | Arquía | Central | Antioquia, Caldas, Cauca, Nariño, Quindío, Risaralda, Valle del Cauca | Thinly banded terrane | ||
| TQ | Quebradagrande | Early Cretaceous | none | Quebradagrande | Central | Antioquia, Caldas, Cauca, Nariño, Quindío, Risaralda, Valle del Cauca | Thinly banded terrane | ||
| 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 | Late Cretaceous | • La Guajira | Etpana, Macuira | Macuira, SNSM | La Guajira, Magdalena | Tayrona, Cabo de la Vela |
Tectonics
of the Coiba Plate underneath the North Andes Plate causes frequent earthquakes in the Bucaramanga Nest, the most seismically active area in the world. The Bucaramanga-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 megaregional fault system; the Eastern 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:
| Abbr | Name | Age range | :Category:Sedimentary basins of Colombia|Basins | Complexes | Ranges | Departments | Comments | Notes |
| PRNJ | Río Negro-Juruena Province | Paleoproterozoic | • Llanos • Putumayo • Amazonas | Mitú, Parguaza, Guaviare | Chiribiquete, Mavecure | Arauca, Caquetá, Casanare, Guainía, Guaviare, Meta, Putumayo, Vaupés, Vichada | Part of Amazonian Craton | |
| PRNJ | - | - | - | - | - | - | Part of Amazonian Craton |