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Fig. 3 | Swiss Journal of Geosciences

Fig. 3

From: Meliatic blueschists and their detritus in Cretaceous sediments: new data constraining tectonic evolution of the West Carpathians

Fig. 3

Structural position and relationships of various Meliatic elements. Gemeric Lower Paleozoic basement and Permian–Triassic cover rocks underwent greenschist-facies metamorphism. Bôrka Nappe is a former distal passive continental margin affected by HP/LT metamorphism: LC—lower complex of Gemeric-type basement and cover rocks; UC—upper complex of Triassic sediments and basalts. PM—polygenous tectonic mélange composed of various fragments derived from the footwall and hangingwall units. Bretka Complex—very low-grade Triassic ophiolitic mélange. Jaklovce Unit—tectonized Jurassic pelagic sediments with olistoliths and olistostromes incl. Triassic ophiolite fragments. Meliata Unit s.s.—very low-grade Jurassic pelagic sediments with olistoliths and olistostromes. Turňa Nappe—very low- to low-grade Upper Paleozoic to Triassic passive margin succession. Numbers denote the approximate age of principal thrust structures shown in red (± 5 Myr): 150 Ma—exhumation of the Bôrka Unit; 145—stacking of Meliatic units and the Turňa Nappe in the developing accretionary wedge; 140 Ma—thrusting of the Meliatic stack over the Gemeric Unit; 135—out-of-sequence folding and thrusting during protracting overriding of the Gemeric Unit. The Silica nappe (not shown) was emplaced considerably later showing a distinct structural and metamorphic discordance with respect to the underlying Meliatic–Turnaic units

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