Cretaceous-Paleogene Boundary in the Shapsug Section (Southern Slope of the Northwest Caucasus)

A silicite horizon corresponding to the global catastrophic event of the Cretaceous-Paleogene boundary was found in the flysch sequence of the Shapsug section on the southern slope of the Northwest Caucasus for the first time. Complexes of radiolarians and planktonic foraminifers, which substantiate the age of the sediments, were identified. Mineralogical and analytical studies testify to the presence of tectites, impact minerals, increased iridium content in the boundary layer of the studied section.