From a tentative correlation of the fault zone with the similarly NW-SE striking dextral Jurassic Gastre Fault System (cf. Rapela & Pankhurst, 1992) in Central Patagonia, Argentina, it was termed ‘Gastre Fault Zone' or ‘Gastre-Purén Fault Zone'. However, in later works it is shown that this correlation is incorrect. Since the lake ‘Lago Lanalhue', is located on the fault trace and shows a NW-SE-elongated shape, ‘Lanalhue Fault Zone (LFZ)' stands as appropriate name for the here discussed fault zone. It was speculated that the inferred Gastre Fault Zone aligned Villarrica, Quetrupillán and Lanín volcanoes, until the Mocha-Villarrica Fault Zone was discovered.