Tierra del Fuego Igneous and Metamorphic Complex is a geological basement complex known from boreholes in northern Tierra del Fuego.

[1][2] The complex is made up of foliated igneous rocks of Cambrian age including orthogneiss.

[1][2] It underlies unconformably the Jurassic Tobífera Formation.

The protoliths of Cordillera Darwin Metamorphic Complex are unrelated to Tierra del Fuego Igneous and Metamorphic Complex despite present-day proximity.

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