Naya-Micay Fault

Naya-Micay Fault
Falla de Naya-Micay
Map showing the location of Naya-Micay Fault
Etymology Naya & Micay Rivers
Location Tumaco Basin
Country  Colombia
Region Pacific/Chocó
State Cauca, Valle del Cauca
Characteristics
Part of Pacific oblique faults
Length 158.2 km (98.3 mi)
Strike 034.1 ± 12
Dip East
Dip angle unknown
Displacement 0.2–1 mm (0.0079–0.0394 in)/yr
Tectonics
Plate North Andean
Status Inactive
Type Oblique thrust fault
Movement Dextral reverse
Age Quaternary
Orogeny Andean

The Naya-Micay Fault (Spanish: Falla de Naya-Micay) is a dextral oblique thrust fault in the departments of Cauca and Valle del Cauca in Colombia. The fault has a total length of 158.2 kilometres (98.3 mi) and runs along an average northeast to southwest strike of 034.1 ± 12 in the Tumaco Basin along the Pacific Coast of Colombia.

Etymology

The fault is named after the Naya and Micay Rivers.[1]

Description

The Naya-Micay Fault runs parallel to and inland of the southwestern Pacific Coast of Colombia in the Cauca and Valle del Cauca departments from Guapi in the south to Buenaventura in the north.[2] The fault displaces marine and non-marine Pliocene sedimentary rocks. It locally offsets undifferentiated Quaternary alluvial deposits. In general, there are uplifted Tertiary sediments on the east and Quaternary sediments on the western side of the fault. The fault appears to be a northern continuation of the Remolino-El Charco Fault. The fault controls drainage of the Guapi River, locally offsets Quaternary deposits, and forms folded paleosoils, elongated basins and ridges and has strong general linear features. Along the coast, it forms typical fault-controlled linear landforms.[1]

See also

References

  1. 1 2 Paris et al., 2000a, p.54
  2. ↑ Paris et al., 2000b

Bibliography

Maps

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