Murindó Fault

The Murindó Fault (

The fault is named after Murindó.^[1]

Description

The fault in the Chocó Basin extends along the western slope of the Western Ranges of the Colombian Andes, from the Arquia River in the south to the Río Sucio and the basin of the Atrato River in the north. The Murindó Fault places Cretaceous volcanic (basic) rocks against Tertiary turbidites, and crosscuts Tertiary quartz-diorite and granodiorite.^[1] The Murindó River flows along the Murindó Fault near Murindó.^[2] The fault underlies the municipalities of Dabeiba and Frontino.^[3] To the south, the fault runs parallel to the Mutatá and Encarnación Faults.^[4][5]

In the southernmost part, the fault shows evidence of tectonic control of streams. It also forms aligned saddles that face toward the mountain front. The fault is active with an approximate slip rate of 0.2 to 1 millimetre (0.0079 to 0.0394 in) per year, and caused the 1992 Murindó earthquake (M_W 7.3) on October 18. A foreshock of 6.7 was registered the day before. Many earthquakes that occurred since 1883 in the region are associated with the Murindó Fault.^[6]

See also

• List of earthquakes in Colombia
• Unguía Fault
• Romeral Fault System

References

Bibliography

• Paris, Gabriel; Michael N. Machette; Richard L. Dart, and Kathleen M. Haller. 2000. 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. 2000. Map of Quaternary Faults and Folds of Colombia and Its Offshore Regions, 1. USGS. Accessed 2017-09-18.
• Cossio, Ubaldo, and Gilberto Zapata. 2007. Plancha 113 - Murindó - 1:100,000, 1.
  INGEOMINAS
  . Accessed 2017-06-06.
• Cossio, Ubaldo, and Gilberto Zapata. 2002. Plancha 128 - Murrí - 1:100,000, 1.
  INGEOMINAS
  . Accessed 2017-06-06.
• Londoño, Ana Cristina, and Humberto González. 2002. Plancha 129 - Cañasgordas - 1:100,000, 1.
  INGEOMINAS
  . Accessed 2017-06-06.
• González, Humberto. 2002. Plancha 145 - Urrao - 1:100,000, 1.
  INGEOMINAS
  . Accessed 2017-06-06.

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.