Trans-border (South-Eastern Serbia/South-Western Bulgaria) correlations of the Jurassic sediments: The Getic and Supra-Getic units

Abstract

The Getic and Supra-Getic are palaeogeographic units in SE Serbia and SW Bulgaria. Based on the presence (in Eastern) or absence (in Western) of Lower Jurassic marine deposits, the Getic is divided into Eastern and Western. In the Eastern Getic, the Lower Jurassic sedimentation in SE Serbia is represented by the Vidlič Clastites covered by the Lukanja Coal Beds, Lukanja Quartz Sandstones, Lukanja Brachiopods Beds, Lukanja Marlstones, Lukanja Belemnitic-Gryphaean Beds and Lukanja Cephalopod Limestones; in SW Bulgaria, the sedimentation commenced with the Tuden Formation, followed by the Kostina Formation and the Ozirovo Formation with a few members. The Middle Jurassic in SE Serbia commenced with the Senokos Siltstones and Shales and the Gulenovci Beds, while in SW Bulgaria with black shales (the Etropole Formation), followed by marls and clayey limestones of the Bov Formation. The Middle Jurassic sediments are represented in the Western Getic of SE Serbia by the Kurilovo Clastites and the Kurilovo Limestones (synonym to Gumpina Limestones of KRAÜTNER & KRSTIĆ 2003); in the Supra-Getic of SE Serbia they are formed by the Jerma Clastites and Jerma Limestones (synonym of the Gumpina Limestones). In SW Bulgaria the Middle Jurassic sediments are represented by the sandstones of the Gradets Formation and by the bioclastic limestones of the Polaten Formation. During the Callovian (Middle?) started the formation of a carbonate platform with micritic limestones. In SE Serbia, it is Basara Limestones, Vidlič Limestones, Beljanica and Ždrelo Limestones, and in SW Bulgarian, the Belediehan Formation of Callovian-Kimmeridgian p.p. age. Characteristic for the Supra- Getic is the formation of a few grabens with specific sedimentation: the Svetlya Graben (the Zhablyano and Ozirovo Formations) and the Lobosh Formation; the Treklyano Graben (the Dobridol and Sredorek Formations), and out of it - the Methohya and Sredorek Formation. During the Callovian-Kimmeridgian p.p., in the Svetlya Graben was sedimented the Lobosh Formation, horizontally passing into the Javorets and Gintsi Formations. During the latest Kimmeridgian-Tithonian commenced a big facial diversification: on the Getic in SE Serbia sedimented reef or sub-reef limestones (the Crni Vrh and Kučaj Reef Limestones), while in SW Bulgaria, the Slivnitsa Formation. On the Supra-Getic in SE Serbia formed Lužnica Flysch and in SW Bulgaria pre-flysch of the Neshkovtsi Formation and siliciclastic flysch of the Kostel Formation

Review and protection possibilities of some trans-border (East Serbia-West Bulgaria) stratigraphic/palaeontological geosites

“…Formerly, this area from a geotectonic point of view was considered as a part of Stara Planina-Poreč structural-facial zone within the unit of first order-the Balkanikum (Andjelković, M. 1978). More recently, from the aspect of plate tectonic theory, the Stara Planina-Poreč terrane is a part of Upper Danubian that corresponds to the northeastern part of Balkan super terrane (Krstić, B. et al 1996;Haydoutov, I., Yanev, S. 1996), and/or Infra-Getic (Tchoumatchenco, P. et al 2008).…”

Palaeoenvironments of northwestern Bulgaria and northeastern Serbia during the Jurassic

“…However, the evidence contained in these papers has long been confined to the Bulgarian/ Serbian state border, and what is beyond the border, in northeastern Serbia, has been known mainly from the publications of Serbian geologists (e.g., Andjelković and Petković, 1975;Andjelković et al 1996;Radulović et al, 1997). During the previous decade, successful correlations between the Jurassic lithostratigraphic units in NW Bulgaria and NE Serbia were made (Tchoumatchenco et al, 2006a(Tchoumatchenco et al, , 2006b(Tchoumatchenco et al, , 2008(Tchoumatchenco et al, , 2010a(Tchoumatchenco et al, , 2010b(Tchoumatchenco et al, , 2011. A result of this is that correlations between the Bulgarian and Serbian Jurassic lithostratigraphic successions have now attained the highest levels of reliability and detail.…”

Trans-border (north-east Serbia/north-west Bulgaria) correlations of the Jurassic lithostratigraphic units

“…The Jurassic sediments within the framework of the study area of eastern Serbia and western Bulgaria enter the following large palaeogeographic units (TCHOUMA- TCHENCO et al 2006aTCHENCO et al , 2008 (from west to east): the Getic (Dragoman Jurassic Pale horst in Bulgaria and Karpatikum in Serbia), divided into two sub-units -Eastern and Western Getic (TCHOUMATCHENCO et al 2008) based on the presence (in Eastern Getic) or absence (in Western Getic) of Liassic sediments; the Infra-Getic Unit (Izdremets Jurassic Palaeograben in Bulgaria and Stara Planina-Poreč Unit in Serbia); the Moesian Platform. The purpose of this paper is the correlation of the Jurassic sediments across the state border in north-east Serbia and north-west Bulgaria.…”