[1] The fault marks a transform boundary between the Scotia plate and the South American plate, cutting across continental crust.
[2] It runs under the Strait of Magellan's western arm, Almirantazgo Sound and Fagnano Lake.
It has been suggested that the Magallanes-Fagnano Fault is a reactivated suture of pre-Jurassic age separating the basement of two terranes.
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