We offer a boreal zonal standard scale providing an effective panboreal correlation and current geological dating of Mesozoic boreal sediments. The need for establishment of a boreal standard is brought about by the fact ...
Investigation results on ammonites, belemnites, and dinoflagellate cysts from Bathonian and Callovian deposits in the North Pechora region are used to elaborate the detailed stratigraphy and to correlate these deposits in ...