Dragoman Rabrenovic

The Ammonites of the Bifrons Zone (Toarcian, Lower Jurassic) from Mihailovići (Northern Montenegro)

The base of the red pelagic nodular limestones exposed near the Mihailovići Pass (Northern Montenegro) yielded condensed Toarcian fossil assemblage consisting uniquely of ammonites. The ammonites were collected from marker horizon associated with prominent hardground surface. This assemblage is composed both of species of worldwide distribution and proper Tethyan dispersal. It includes frequent Lytoceratina and common Phylloceratina and Ammonitina. The latter allowed the biostratigraphic definition of the fossiliferous horizon as mid-Bifrons Subzone of the Lower Toarcian Bifrons Zone. Thirteen ammonite taxa were studied: Phylloceras heterophyllum (Sowerby), P. prinzi Géczy, Calliphylloceras nilssoni (Hebert), Lytoceras toarcense Rulleau, Nodicoeloceras angelonii (Ramaccioni), Hildoceras lusitanicum Meister, H. bifrons (Bruguière), Cingolites aff. picenus Sassaroli & Venturi, Osperleioceras subexaratum (Bonarelli), Harpoceras mediterraneum Pinna, Phymatoceras anomalum Merla, Ph. gr. narbonense Buckman and Ph. cf. formosum Rulleau & Elmi. One specimen was defined as Harpoceras sp. n. since it did not match any species from the literature, but might be erected as a new specific name if further materials appear.

Geology and hydrogeology of the Čemernica mountain massif, Western Serbia

The mountain massif of Cemernica, Western Serbia, is an orogenic feature of the Inner Dinarides. Hitherto, hydrogeological prospecting of the Massif was all on a regional scale, not detailed. Only scanty data, previously collected, were mappable on a scale larger than 1:100 000. The 2005 to 2008 research of the Cemernica Mountain Massif included geological and hydrogeological reconnaissance and mapping, the employment of remote sensing, a geophysical survey, the monitoring of quantitative and qualitative groundwater variation parameters, etc. The groundwaters of Cemernica are a large potential resource of water supply to multiple users. This paper is a contribution to the study of the geology and hydrogeology of the Cemernica Mountain Massif.