Middle thrust sheets in the caledonide orogen, sweden : The outer margin of baltica, the continent–ocean transition zone and late Cambrian–Ordovician subduction–accretion
Nappes of continental outer and outermost margin affinities (Middle Allochthon) were transported from locations west of the present Norwegian coast and thrust eastwards onto the Baltoscandian foreland basin and platform. They are of higher metamorphic grade than underlying thrust sheets and most are more penetratively deformed. These allochthons are treated here in three groups. The lower thrust s