Huincul Fault

Not to be confused with Huincul Formation.

The Huincul Fault or Huincul Fault Zone (Spanish: Falla de Huincul, Zona de falla Huincul) is an east-to-west-oriented, continental-scale fault that extends from the Neuquén Basin eastwards into the Argentine Shelf, passing near the cities of Plaza Huincul and Cutral Có, in central Neuquén Province (approximately 38°39′S 69°12′W / 38.65°S 69.20°W / -38.65; -69.20). To the west, it has been proposed that the fault extends across the Andes to the Chilean Coast Range.

In the Neuquén Basin, the fault exhibits a slightly curved path, being convex to the north. It is a major geological discontinuity and it truncates the north-to-south-oriented Pampean orogen, among other structures. Because of this, it has been proposed to represent the northern geological limit of Patagonia.

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