The structure and regional significance of the Talea Ori,Crete |
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| Authors: | R Hall MG Audley-Charles |
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| Institution: | Department of Geological Sciences, Queen Mary College, Mile End Road, London E1 4NS, England;Department of Geology, University College, Gower Street, London WC1E 6BT, England |
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| Abstract: | On the basis of detailed geological mapping in the Talea Ori of Crete, metamorphic rocks previously interpreted as basement to the Plattenkalk Series are re-interpreted as down-faulted parts of the overlying Phyllite-Quartzite Series nappe. A supposed unconformity separating these two units is shown to be a high-angle fault. The Phyllite-Quartzite Series and overlying nappes were affected by two major deformational phases, whereas the Plattenkalk Series has a simpler structural history and was folded and imbricated by southwards-directed overthrusting which emplaced the Phyllite-Quartzite Series nappe and other overlying nappes in the Oligocene. We reject previous models of a huge inversion of the Plattenkalk Series and we also consider that considerable local inversion by tight to isoclinal folding and thrusting means that the stratigraphic thickness is much less than previously appreciated. The differences between the structural and sedimentological histories of the Plattenkalk Series and the overlying nappes implies that they were separated by a major crustal discontinuity, such as a transform or transcurrent fault, before the Oligocene overthrusting. |
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