Mulato-Getudo Fault

The Mulato-Getudo or Mulato-Jetudo Fault (Spanish: Falla de Mulato-Jetudo) is a sinistral oblique thrust fault in the departments of Tolima, Caldas and Antioquia in central Colombia. The fault has a total length of 187.3 kilometres (116.4 mi) and runs along an average north-northeast to south-southwest strike of 016.7 ± 9 in the Middle Magdalena Valley and along the western foothills of the Central Ranges of the Colombian Andes.

Mulato-Getudo Fault
Mulato-Jetudo Fault, Falla de Mulato-Jetudo
Map showing the location of Mulato-Getudo Fault
Map showing the location of Mulato-Getudo Fault
EtymologyMulatos & Jetudo Rivers
Coordinates05°20′35″N 74°51′23″W
Country Colombia
RegionAndean
StateAntioquia, Caldas, Tolima
CitiesMariquita
Characteristics
RangeCentral Ranges, Andes
Part ofAndean oblique faults
Length187.3 km (116.4 mi)
Strike016.7 ± 9
DipWest
Dip angleHigh to medium
Displacement<0.2 mm (0.0079 in)/yr
Tectonics
PlateNorth Andean
StatusInactive
TypeOblique thrust fault
MovementReverse sinistral
AgeQuaternary
OrogenyAndean

Etymology

The fault is named after the Mulatos and Jetudo Rivers, left tributaries of the Magdalena River.[1]

Description

The Mulato-Getudo Fault, in some parts called Jetudo Fault,[2] extends along the eastern foothills of the Central Ranges of the Colombian Andes, where it marks the abrupt break in slope of the east-tilted Tertiary erosion surface of the Cordillera and the flat alluvial plains of the Magdalena River in the Middle Magdalena Valley. The fault forms a regional-scale degraded fault escarpment with an outstanding break in slope. It offsets Pliocene to Quaternary deposits and an extensive tilted erosional surface of probable Miocene to Pliocene age (pre-Mesa Formation, older than 1.5 Ma). The northern half of the fault is characterised by aligned drainages and broad valleys.[1] The fault possibly underlies the Honda Group south of the La Miel River.[3]

See also

References

  1. Paris et al., 2000, p.31
  2. Plancha 5-09, 2015
  3. Plancha 188, 2009

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

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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