Abstract
Abstract St. Anastasia Island is one of the symbols of the cultural and historical heritage of the Republic of Bulgaria. This raises the need for the study of risky oceanographic factors, climatic phenomena, risky geological processes as well as detailed petrographical characteristics of the Upper Cretaceous volcanic rocks forming the islands. The results of the petrographical study show that the island was built by Alkali feldspar trachytes. The volcanics from St. Anastasia Island shows a close petrochemical similarity to the volcanics from Alatepenski paleovolcano belonging to the “Peripheral Volcanic Centers” in the region.
Highlights
In the period 2018-2019 was made an engineering-geological investigation of the St
Anastasia Island is one of the symbols of the cultural and historical heritage of the Republic of Bulgaria. This raises the need for the study of risky oceanographic factors, climatic phenomena, risky geological processes as well as detailed petrographical characteristics of the Upper Cretaceous volcanic rocks forming the islands
It is confirmed that in connection with the construction of future hydrotechnical facilities, the studied area is presented of Upper Cretaceous volcanic rocks and Corresponding author: dimpetdim@io-bas.bg
Summary
In the period 2018-2019 was made an engineering-geological investigation of the St. Anastasia Island [1]. The Engineering-geological research relates to the development of concepts for the reconstruction and extension of an existing harbor for small vessels on St. Anastasia Island in order to protect the water area from dangerous geological and meteorological conditions. It is confirmed that in connection with the construction of future hydrotechnical facilities, the studied area is presented of Upper Cretaceous volcanic rocks and Full Paper. Quaternary marine sediments, subjected to the active impact of lithodynamic processes in Burgas Gulf. Marine sands samples were taken for granulometric analysis, as well as rock specimens of volcanics to clarify their petrographic composition, structural-textural features, classification and nomenclature status
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