New Bio-, Chemo-, and Magnetostratigraphy of the Santonian–Campanian Boundary in the Kudrino and Aksu-Dere Sections (SW Crimea): Problems of Global Correlation and Selection of the Lower Boundary Stratotype of the Campanian. 1. Geological Framework, Sedimentology, Biostratigraphy

— New complex data have been obtained for two sections of the Santonian–Campanian boundary of Southwestern Crimea. Article 1 presents detailed geological descriptions of sections, lithological, mineralogical, and paleoichnological materials, and the results of determining macro- (crinoids, ammonoids, belemnites) and micropaleontological (dinocysts, nannoplankton, benthic and planktonic foraminifers) remains. On the basis of the results of research, sea level fluctuations, variations in the activity of allogenic input (including pyroclastic material), and other features of sedimentation have been reconstructed. All macro- and micropaleontological data confirm the late Santonian–early Campanian age of the rocks; for each of the micropaleontological groups, biostratigraphic units have been established and a detailed division of the sections has been carried out.