The Vianí Fault ( Spanish : Falla de Vianí ) is a dextral oblique thrust fault in the department of Cundinamarca in central Colombia . The fault has a total length of 38.3 kilometres (23.8 mi) and runs along an average northwest to southeast strike of 055.5 ± 15 in the Eastern Ranges of the Colombian Andes .
3-629: The fault is named after Vianí , Cundinamarca . The Vianí Fault is located on the western slope of the Eastern Ranges of the Colombian Andes . The fault places Lower Cretaceous rocks of the Villeta Group ( Trincheras , Simijaca , Hiló and Capotes Formations ), to the northwest against Upper Cretaceous rocks of the Güagüaquí Group to the southeast. In the southern area of the fault,
6-712: The east and south. It forms the northwestern boundary of the Bogotá savanna . A maximum moment magnitude earthquake is estimated to be 7.2 on the basis of probable rupture of entire fault length. The slip rate is estimated at 0.1 to 1 millimetre (0.0039 to 0.0394 in) per year based on offset morphologic and neotectonic features. Gómez Tapias, Jorge; Montes Ramírez, Nohora E.; Almanza Meléndez, María F.; Alcárcel Gutiérrez, Fernando A.; Madrid Montoya, César A.; Diederix, Hans (2015). Geological Map of Colombia . Servicio Geológico Colombiano . pp. 1–212 . Retrieved 2019-10-29 . Vian%C3%AD Vianí
9-646: The north–south oriented Vianí Fault thrusts the Seca Formation on top of the Hoyón Formation . Farther to the north at Vianí, the fault strike changes to northeast–southwest and the fault displaces the Bituima Fault . The fault trace is characterised by offset spurs, degraded fault scarps , saddles, small pull-apart basins , aligned drainage, and deflected streams. The fault borders the Guaduas Synclinal to
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