Sierra de Bequeville is a mountain range in Argentina.
The Eocene Geste Formation, a 500 metres (1,600 ft) thick welded tuff and correlative rocks dated to 16.7 ± 0.1 million years ago, and continental clast strata from 13.21 ± 0.6 million years ago form the rest of the range.
Cinder cones along the Bequeville fault which runs in the range have erupted lava flows of basaltic andesite composition which are similar to other Puna volcanic rocks.
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