allochthon

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al·loch·thon

 (ə-lŏk′thən)
n. pl. al·loch·thons or al·loch·tho·nes (-thə-nēz′)
1. One that originated or was formed in a place other than where it is found, especially a rock formation that has been displaced.
2. A member of a human population that relocated or was displaced from a particular area.
3. Ecology A plant or animal that is not indigenous.

[German : allo-, allo- (from Greek, from allos, other; see al- in Indo-European roots) + Greek khthōn, earth; see dhghem- in Indo-European roots.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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This tectonic allochton covers as part of Miocene foredeep, as older, Variscan consolidated tectonic level, which represents a submerged continuation of the Epivariscan platform of the Bohemian Massif.
The enigmatic Finnmarkian event in the North of Norway at about 489 Ma, whether a true orogeny, an arc-continent collision followed by subduction, or just a transtensional mega-shear zone certainly provided metamorphic shale material heated between 150 and 550[degrees]C and sideways thrust for lithological facies folding and for spreading the allochtons as far as Oslo.
Considering all these contradictions a simple solution, emplacement of orogenic allochtons presents itself.