Murrí Fault

Murrí Fault
	Falla Murrí
Etymology	Murrí River
Country	Colombia
Region	Andean
State	Antioquia
Characteristics
Range	Central Ranges, Andes
Part of	Andean oblique faults
Length	87.1 km (54.1 mi)
Strike	001.4 ± 5
Dip	unknown
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	Reverse sinistral
Age	Quaternary
Orogeny	Andean

The Murrí Fault (Spanish: Falla Murrí) is an oblique thrust fault in the department of Antioquia in northwestern Colombia. The fault has a total length of 87.1 kilometres (54.1 mi) and runs along an average north-south strike of 001.4 ± 5 along the Central Ranges of the Colombian Andes.

Etymology

The fault is named after the Murrí River in Antioquia.[1]

Description

Located in the western limb of the Western Ranges of the Colombian Andes. The fault puts Cretaceous mafic igneous rocks to the east in contact with Tertiary marine sedimentary rocks to the west. The fault cuts mud flows dated at about 10,000 to 15,000 years. It causes strong lineaments and offsets terraces and alluvial deposits. The fault forms well-developed scarps of about 20 metres (66 ft) high on late Quaternary alluvial deposits.[1]

The fault forms the course of the Penderisco River and cuts perpendicular to the Ocaidó Valley.[2] Some authors consider the fault the southern part of the Murrí-Mutatá Fault.[3][4]

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References

Paris et al., 2000, p.17
Plancha 145, 2002
Plancha 129, 2002
González, 2001, p.183

Bibliography

González, Humberto. 2001. Mapa Geológico del Departamento de Antioquia - 1:400,000 - Memoria explicativa, 1–120. INGEOMINAS.
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

Paris, Gabriel; Michael N. Machette; Richard L. Dart, and Kathleen M. Haller. 2000b. Map of Quaternary Faults and Folds of Colombia and Its Offshore Regions, 1. USGS. Accessed 2017-09-18.
Londoño, Ana Cristina, and Humberto González. 2002. Plancha 129 - Cañasgordas - 1:100,000, 1. INGEOMINAS. Accessed 2017-06-06.
González, Humberto. 2002. Plancha 145 - Urrao - 1:100,000, 1. INGEOMINAS. Accessed 2017-06-06.