Saamian orogeny

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The Saamian orogeny is one of the earliest recognizable events in the formation of the Baltic Shield, between 3.1 and 2.9 billion years ago in the Archean and Proterozoic. [1] The Saamian orogeny is associated with intense plutonic activity that intruded massive granitoid deposits. The event lined up with the Katarchean, a period in which the Earth's crust approached its present thickness and sialic rocks, rich in silica and aluminum, became commonplace. [2]


  1. ^ Gabor Gaál, Roland Gorbatschev (1987). "An Outline of the precambrian evolution of the baltic shield". Precambrian Research. doi:10.1016/0301-9268(87)90044-1. Cite journal requires |journal= (help)
  2. ^ Salop, L.J. (1982). Geological Evolution of the Earth During the Precambrian. Springer-Verlag.