title: Sources of Clastic Material for the Cretaceous‒Paleogene Boundary Deposits in Klementyev Mountain, Eastern Crimea: Results of the U‒Th‒Pb Dating of Detrital Zircon Grains and Their Significance for Regional Paleogeographic Reconstructions
abstract: The paper presents results of the U–Th–Pb isotope dating (LA-ICP-MS) of detrital zircons from sandstones of the Upper Cretaceous (Maastrichtian)–Lower Paleogene (Danian) boundary level sections, Klementyev Mountain section, Uzyn-Syrt Upland (eastern Crimean Mountains). The obtained data set from the Upper Maastrichtian Klementyev Formation (sample K22-001) contains the following number of dates: 5 Jurassic, 22 Triassic, 55 Paleozoic (including 10 Permian and 7 Carboniferous), 18 Neoproterozoic, 
journal: Lithology and Mineral Resources