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 / 5.34306°N 74.85639°W / 5.34306; -74.85639
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

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

Description

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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

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References

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

Bibliography

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  • Paris, Gabriel; Machette, Michael N.; Dart, Richard L.; Haller, Kathleen M. (2000a), Map and Database of Quaternary Faults and Folds in Colombia and its Offshore Regions (PDF), USGS, pp. 1–66, retrieved 2017-09-18

Maps

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Further reading

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  • Page, W.D (1986), Seismic geology and seismicity of Northwestern Colombia, San Francisco, California, Woodward-Clyde Consultants Report for ISA and Integral Ltda., Medellín, pp. 1–200