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. , 55, . I, , 2012 ANNUAL OF THE UNIVERSITY OF MINING AND GEOLOGY ST. IVAN RILSKI, Vol. 55, Part I, Geology and Geophysics, 2012 , , , . , 1700 ; vjjelev@yahoo.com . , . , ( , , , , , , .), . , . , . . , , , . , , . , , , , . , . GEOTOPES MOUTH OF VELEKA RIVER AND SILISTAR FOUNDATION OF A NATURAL GEOPARK OF PALEOVOLCANOLOGY Venelin Jelev, Boris Valchev, Krasimira Karsheva, Dimitar Sachkov University of Mining and Geology St. Ivan Rilski, 1700 Sofia; vjjelev@yahoo.com ABSTRACT. Bulgarian Black Sea coast south of the town of Ahtopol gives an excellent opportunity for field examination of the Upper Cretaceous volcanic and volcano-sedimentary deposits cropping out in the steep coast slopes and included in two geotopes Mouth of Veleka River and Silistar. The first geotope includes part of the sea coast between the town of Ahtopol and the village of Sinemorets, which reveals various facies of Papiya and Ahtopol paleovolcanoes (lava flows of basalts, pillow-lavas of alkaline trachytes, hyaloclastites, eruptive breccias, dykes and sills, tuffs, tuffites etc.), partly faulted. A beautiful sand point bar is situated in the mouth of VelekaRiver at the south end of the geotope. The second geotope comprises the sea coast south of the village of Sinemorets. Uninterrupted outcrops of the Upper Cretaceous section could be observed here. They include volcanic and volcano-sedimentary rocks, intruded by the Silistar pluton. These rocks are faultedand comprise cooper mineralizations at several places. The landscape is amazing, with small bays and beaches, steep fiord-like inlets and characteristic transitional-Mediterranean flora. According to the classification of geological phenomena, both geotopes are referred to the geosites of aesthetic, scientific, educationalandresearch value, and according to the original Bulgarian methodology for estimating of geological phenomena they correspond to the criteria for geosites of regional and continental importance. The present article aims to describe two geological routes between the town of Ahtopol and SilistarBay, to expand the range of the geotopes, and to lay the foundation for covering the southern Bulgarian Black Sea coast into a natural geopark of paleovolcanology.

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Nakov, R., T. Kerestedjian, A. Kunov. 2002. The Silistar Intrusive, Eastern Srednogorie zone, Bulgaria: Structural data and potential for porphyry-copper andepithermal systems. - Turkish J. Earth Sci., 11, 217-229.

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