Murrí Fault

The Murrí Fault (Spanish: Falla Murrí) is an oblique thrust fault in the department of Antioquia in northwestern Colombia. The fault has a total length of 87.1 kilometres (54.1 mi) and runs along an average north-south strike of 001.4 ± 5 along the Central Ranges of the Colombian Andes.

Murrí Fault
Falla Murrí
Map showing the location of Murrí Fault
Map showing the location of Murrí Fault
EtymologyMurrí River
Coordinates06°41′21″N 76°22′11″W
Country Colombia
RegionAndean
StateAntioquia
Characteristics
RangeCentral Ranges, Andes
Part ofAndean oblique faults
Length87.1 km (54.1 mi)
Strike001.4 ± 5
Dipunknown
Dip angleunknown
Displacement0.2–1 mm (0.0079–0.0394 in)/yr
Tectonics
PlateNorth Andean
StatusInactive
TypeOblique thrust fault
MovementReverse sinistral
AgeQuaternary
OrogenyAndean

Etymology

The fault is named after the Murrí River in Antioquia.[1]

Description

Located in the western limb of the Western Ranges of the Colombian Andes. The fault puts Cretaceous mafic igneous rocks to the east in contact with Tertiary marine sedimentary rocks to the west. The fault cuts mud flows dated at about 10,000 to 15,000 years. It causes strong lineaments and offsets terraces and alluvial deposits. The fault forms well-developed scarps of about 20 metres (66 ft) high on late Quaternary alluvial deposits.[1]

The fault forms the course of the Penderisco River and cuts perpendicular to the Ocaidó Valley.[2] Some authors consider the fault the southern part of the Murrí-Mutatá Fault.[3][4]

See also

References
  1. Paris et al., 2000, p.17
  2. Plancha 145, 2002
  3. Plancha 129, 2002
  4. González, 2001, p.183

Bibliography
  • González, Humberto. 2001. Mapa Geológico del Departamento de Antioquia - 1:400,000 - Memoria explicativa, 1–120. INGEOMINAS.
  • 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

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.
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