Vaca Muerta photograph

Vaca Muerta

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Regions Neuquen
Named byCharles E. Weaver
Year defined1931
OtherOrganic shale, lime-mudstone
Primary Marl
Thickness30–1,200 m (98–3,937 ft)
Date of Reg.
Date of Upd.
ID2592620
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About Vaca Muerta


The Vaca Muerta Formation, commonly known as Vaca Muerta is a geologic formation of Late Jurassic to Early Cretaceous age, located in the Neuquén Basin in northern Patagonia, Argentina. It is well known as the host rock for major deposits of shale oil and shale gas.

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