La Dina Fault

La Dina Fault (Spanish: Falla La Dina) is a regional dextral oblique thrust fault in the departments of Huila and Tolima in southwestern Colombia. The fault has a total length of 206.9 kilometres (128.6 mi) and runs along an average northeast to southwest strike of 032.9 ± 13 in the Upper Magdalena Valley and the Central Ranges of the Colombian Andes.

La Dina Fault
Falla La Dina, El Agrado-Betania Fault
Coordinates02°55′52″N 75°25′36″W
Country Colombia
RegionAndean
StateHuila, Tolima
Characteristics
RangeCentral Ranges, Andes
Part ofAndean oblique faults
Length206.9 km (128.6 mi)
Strike032.9 ± 13
DipWest
Dip angle40-60
Displacement0.2–1 mm (0.0079–0.0394 in)/yr
Tectonics
PlateNorth Andean
StatusInactive
TypeOblique thrust fault
MovementDextral reverse
Rock unitsHonda Gp., Chicoral Gp., Olini Gp., Saldaña Fm.
AgeQuaternary
OrogenyAndean

Description

La Dina Fault lies east of La Plata Fault in southwestern Colombia. The fault displaces Jurassic (Saldaña Formation), Cretaceous (Chicoral and Olini Groups), and Tertiary (Honda Group) sedimentary rocks, which are common in the Upper Magdalena Valley. Local names assigned to the southern extension of this fault are from north to south: Betania, Pital-Agredo and Magdalena.[1] It is also called the El Agrado-Betania Fault in Huila, where it underlies the Betania Reservoir.[2] The fault is marked by well-developed trace, abrupt slope changes, saddles, and small scarps.[1]

See also

References
  1. Paris et al., 2000a, p.58
  2. Mapa Geológico del Huila, 2001

Bibliography

Maps
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