Rhodope Geodynamic Hazards,
Late Alpine tectonics and Neotectonics

International Conference - May 2001

Photogallery Krayshte

* Gurbino thrust, village of Gurbino  The Gurbino thrust represents a south-vergent insertion of basement rocks (Frolosh Formation: metadiabases, serpentinites) as a 5 - 8 m thin and more than 2 km long inlier into the basal part of the Triassic Iskur Carbonate Group. This unique feature will be directly observed in the road cuts.
  * Panorama of the Skakavitsa shear zone and folds with the Skakavitsa waterfall   The Skakavitsa shear zone is characterized by a polydeformational sequence of thrusting, folding and normal faulting events in the Triassic cover of the Vendian-Cambrian Frolosh Formation. The structure with the Skakavitsa Waterfall (52 m) will be observed from the previous locality.
*  J/T unconformity, village of Bosnek  The Middle Jurassic (Bajocian-Bathonian) Polaten Formation (oolithic and biodetrital limestone) covers with parallel unconformity and basal conglomerate the Norian Trun Formation (limestone and dolomite) at the karst spring in the village of Bosnek.
*  NE-vergent anticline, Kobilska reka At the confluence of the rivers, marine red beds of the Komshtitsa Formation contain limestone interbeds with gastropods, echinids and foraminifers. A NE-vergent anticline is related to NE-vergent Mid-Cretaceous thrusting of the Morava over the Strouma superunit.
*  Type section of Rayantsi Formation  Near the village of Rayantsi, the Rayantsi Formation (Aalenian - Oxfordian) consists of deep marine deposits (shales with radiolarites). The section is folded into almost isoclinal folds with parallel bedding and slaty cleavage. 
*  Core of Murvodol antiformal syncline  At the southern entrance of the village of Murvodol, the core of the Murvodol antiformal syncline exhibits Middle Triassic limestones covered (overturned section) by uppermost Lower Triassic (marls, shales), Lower Triassic continental red beds and Permian red beds. On top, the pre-Ordovician basement (Strouma diorite formation) is thrusted NNE along the Skrino thrust.
Section in the river Poletinski dol 
 From top to bottom: Palaeozoic granites and schists (Poletintsi thrust sheet); black shales of Middle Jurassic Momchil Formation, white sandstone and red shales of Upper Triassic Komshtitsa Formation, Upper Triassic limestone (Dragovishtitsa thrust sheet); thrust surface; pre-Ordovician Lisets diorites (c. 540 Ma)
*  Tight fold in Kostel Formation   At the village of Sredorek, Upper Jurassic - Lower Cretaceous flysch of the Kostel Formation is folded in East-vergent tight folds related to the thrusting of the Morava over the Strouma superunit
Vonska klippe of the Penkyovtsi thrust near the Divlya village 
  Devonian lydites, slates and wavy nodular limestones from the Vonska klippe of the Penkyovtsi thrust (Morava superunit) are thrust over Upper Jurassic flysch of Kostel Formation. Numerous internal thrust surfaces form something similar to tectonic melange. On the upper photograph are observed (from top to bottom; all with thrust contacts) packets of lydites, wavy nodular limestones, lydites, limestones, boudinaged granites (from layer-parallel thin body). On the lower photograph - detail with lydite and limestone packets.
*Skrino thrust near Pastouh  Near the village of Pastouh, the Strouma diorites with later dolerite dykes (pre-Ordovician basement) are thrust over the Permian Skrino Formation (red beds)

 * Localities included in the field trip marked with asterisk

© Geological Institute of the Bulgarian Academy of Sciences
Author: Ivan Zagorchev
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