Cañasgordas Fault
| Cañasgordas Fault | |
|---|---|
| Falla de Cañasgordas | |
  | |
| Etymology | Cañasgordas |
| Country |
 |
| Region | Andean |
| State | Antioquia |
| Cities | Dabeiba |
| Characteristics | |
| Range | Western Ranges, Andes |
| Part of | Andean oblique faults |
| Length | 54.8 km (34.1 mi) |
| Strike | 316 ± 4 |
| Dip | Southwest |
| Dip angle | High |
| Displacement | ~0.01–0.1 mm (0.00039–0.00394 in)/yr |
| Tectonics | |
| Plate | North Andean |
| Status | Inactive |
| Type | Oblique thrust fault |
| Movement | Reverse sinistral |
| Age | Quaternary |
| Orogeny | Andean |
The Cañasgordas Fault (Spanish: Falla de Cañasgordas) is an oblique thrust fault in the department of Antioquia in northwestern Colombia. The fault has a total length of 54.8 kilometres (34.1 mi) and runs along an average northwest to southeast strike of 316 ± 4 in the Western Ranges of the Colombian Andes.
Etymology
The fault is named after Cañasgordas.[1]
Description
The Cañasgordas Fault is located to the northwest of the city of Medellín. The fault traverses most of the Western Ranges of the Colombian Andes between the towns of Dabeiba and Giraldo in the department of Antioquia. The Cañasgordas Fault probably joins the Mutatá Fault. The fault displaces Cretaceous sedimentary and volcanic rocks, Tertiary sedimentary rocks, and Quaternary mud flows. The fault forms strong linear features on satellite images and aerial photographs and controls the course of the Río Sucio, which has a prominent, linear V-shaped valley. Fault scarps are formed on Quaternary mud flows.[1] The slip rate is estimated at 0.01 to 0.1 millimetres (0.00039 to 0.00394 in) per year deduced from offset of mud flows and the fault was probably active in the Late Pleistocene.[2]
See also
References
Bibliography
- Paris, Gabriel; Michael N. Machette; Richard L. Dart, and Kathleen M. Haller. 2000a. Map and Database of Quaternary Faults and Folds in Colombia and its Offshore Regions, 1–66. USGS. Accessed 2017-09-18.
Maps
- Paris, Gabriel; Michael N. Machette; Richard L. Dart, and Kathleen M. Haller. 2000b. Map of Quaternary Faults and Folds of Colombia and Its Offshore Regions, 1. USGS. Accessed 2017-09-18.
Further reading
- Page, W.D. 1986. Seismic geology and seismicity of Northwestern Colombia, 1–200. San Francisco, California, Woodward-Clyde Consultants Report for ISA and Integral Ltda., Medellín.
