The Naya-Micay Fault ( es, Falla de Naya-Micay) is a dextral oblique

thrust fault A thrust fault is a break in the Earth's crust, across which older rocks are pushed above younger rocks. Thrust geometry and nomenclature Reverse faults A thrust fault is a type of reverse fault that has a dip of 45 degrees or less. If ...

in the

departments Department may refer to: * Departmentalization, division of a larger organization into parts with specific responsibility Government and military *Department (administrative division), a geographical and administrative division within a country, ...

of Cauca and Valle del Cauca in

Colombia Colombia (, ; ), officially the Republic of Colombia, is a country in South America with insular regions in North America—near Nicaragua's Caribbean coast—as well as in the Pacific Ocean. The Colombian mainland is bordered by the Car ...

. The fault has a total length of 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.Paris et al., 2000a, p.54

Description

The Naya-Micay Fault runs parallel to and inland of the southwestern

Pacific Coast Pacific coast may be used to reference any coastline that borders the Pacific Ocean. Geography Americas Countries on the western side of the Americas have a Pacific coast as their western or southwestern border, except for Panama, where the Pac ...

of Colombia in the Cauca and Valle del Cauca

from Guapi in the south to Buenaventura in the north.Paris et al., 2000b The fault displaces marine and non-marine

Pliocene The Pliocene ( ; also Pleiocene) is the epoch in the geologic time scale that extends from 5.333 million to 2.58sedimentary rock Sedimentary rocks are types of rock that are formed by the accumulation or deposition of mineral or organic particles at Earth's surface, followed by cementation. Sedimentation is the collective name for processes that cause these particles ...

s. It locally offsets undifferentiated

Quaternary The Quaternary ( ) is the current and most recent of the three periods of the Cenozoic Era in the geologic time scale of the International Commission on Stratigraphy (ICS). It follows the Neogene Period and spans from 2.58 million years ...

alluvial Alluvium (from Latin ''alluvius'', from ''alluere'' 'to wash against') is loose clay, silt, sand, or gravel that has been deposited by running water in a stream bed, on a floodplain, in an alluvial fan or beach, or in similar settings. Alluv ...

deposits. In general, there are uplifted

Tertiary Tertiary ( ) is a widely used but obsolete term for the geologic period from 66 million to 2.6 million years ago. The period began with the demise of the non-avian dinosaurs in the Cretaceous–Paleogene extinction event, at the start ...

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 Remolino-El Charco Fault ( es, Falla de Remolino-El Charco) is a dextral strike-slip fault in the department of Nariño in Colombia. The fault has a total length of and runs along an average northeast to southwest strike of 046.4 ± 6 in the ...

. The fault controls drainage of the

Guapi River The Guapi River ( es, Río Guapi) is a river of Colombia that flows into the Pacific Ocean near the town of Guapi, Cauca. The mouth of the river has extensive stands of mangroves, part of the Esmeraldes-Pacific Colombia mangroves ecoregion. See ...

, 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.

References

Bibliography

Maps

* {{Tectonism in Colombia Seismic faults of Colombia Thrust faults Strike-slip faults Inactive faults Faults Faults

Etymology

Description

See also

References

Bibliography

Maps