The Paleogene sedimentary rocks in the north-easternmost part of the territory of Bulgaria have been penetrated by numerous boreholes. In terms of regional tectonic zonation, the study area is a part of the onshore sector of the Moesian Platform, which partly includes the South Dobrogea Unit and the easternmost part of the North Bulgarian Dome with its eastern slope. The lithostratigraphy of the Paleogene successions consists of six formal units (the Komarevo, Beloslav, Dikilitash, Aladan, Avren, and Ruslar formations) and one informal unit (glauconitic marker). For compiling an overall conception of the regional aspects (lithology, thickness, spatial distribution, and relationships) of the individual lithostratigraphic units and for illustration of their spatial distribution, a 3D lithostratigraphic model based on reinterpretation of individual borehole sections has been created. The model database was compiled by integration of the original lithological data from 338 borehole sections.
The present study deals with the taxonomy of the Palaeogene planktonic foraminifera of the Republic of Macedonia. Five species belonging to two genera, one family (GLOBIGERINIDAE Carpenter, Parker, and Jones, 1862), and one superfamily are described for the first time from this part of the Balkan Peninsula. The studied micropalaeontological material was obtained from eight outcrop sections belonging to five sedimentary basins.
This study is based on primary lithological data from 96 boreholes and lithostratigraphic interpretation of 17 seismic profiles from the onshore part of the Dolna Kamchiya Basin, which belongs to the onshore sector of the Moesian Platform and comprises the south-easternmost part of the Southern platform zone. Nine formal Paleogene lithostratigraphic units were recognized (the Byala, Komarevo, Dvoynitsa, Beloslav, Dikilitash, Aladan, Avren formations, the Dolni Chiflik Member of the Avren Formation, and the Ruslar Formation). For visualization of their spatial relationships and revealing the deep structure of the basin, a 3D lithological model was created. In addition, new data on the lithology, thicknesses and ages of the units were provided.
This study is based on biostratigraphic data from 53 boreholes and chronostratigraphic interpretation of 16 seismic profiles from the onshore part of the Dolna Kamchia Basin (DKB). Seven Paleogene chronostratigraphic units were recognized (the Danian, Thanetian, Ypresian, Lutetian, Bartonian, Priabonian stages, and the Oligocene Series). For visualization of their spatial distribution and relationships, a 3D chronostratigraphic model is created.
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