Oca-Ancón Fault System
The Oca-Ancón Fault System (Spanish: Falla Oca-Ancón) is a complex of geological faults located in northeastern Colombia and northwestern Venezuela near the Caribbean Sea. The fault system is of right-lateral strike-slip type and extends for an approximate length of 830 km (520 mi). The Oca-Ancón Fault System is part of the diffuse boundary between the Caribbean Plate and the South American Plate. The movement rate of the Oca-Ancón Fault System is estimated at 2 millimetres (0.079 in) each year, more than most Venezuelan faults.
| Oca-Ancón Fault | |
|---|---|
| Falla Oca-Ancón | |
Location of the fault in Venezuela | |
Topographic map of northern Colombia showing the Oca Fault segment | |
| Location | Northern South America |
| Coordinates | 11°00′N 71°45′W |
| Country | Colombia Venezuela |
| Region | Caribbean |
| State | La Guajira Falcón, Zulia |
| Cities | Maracaibo |
| Characteristics | |
| Range | Sierra Nevada de Santa Marta, Serranía del Perijá, Venezuelan Coastal Range |
| Part of | Andean faults |
| Segments | Oca, Ancón |
| Length | 830 km (520 mi) |
| Strike | 275 ± 7 (W-E) |
| Dip angle | Vertical to subvertical |
| Displacement | 0.2–2 mm (0.0079–0.0787 in)/yr |
| Tectonics | |
| Plate | South American |
| Status | Active |
| Earthquakes | 1834 |
| Type | Strike-slip fault |
| Movement | Dextral |
| Age | Late Pleistocene-Holocene |
| Orogeny | Andean |
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