ИСТИНА

The new data on the Hauterivian stratigraphy and correlation in Russia and the CIS countries are preseted (Baraboshkin, 2001-2008). Direct Boreal-Tethyan correlation of Lower Hauterivian (LH) is impossible because of absence of a marine connection through the Russian Platform (RP). In the Caspian region it is missing or represented by continental facies: in the Crimea and Caucasus the LH is typically Tethyan. In Yaroslavl City (RP) the "Lower Hauterivian" "Homolsomites" ivanovi is now referred to Prodichotomites (Jeletzky & Kemper, 1988) and Progorodzovia jaroslavlensis is redetermined as Upper Valanginian (UV) Ringnesiceras sp. aff. amundense (Kiselev et al., 2003). Therefore, most of the "Lower Hauterivian" of Yaroslavl should be considered as UV, except for the Pavlovites polyptychoides and Gorodzovia mosquitini zones. Finds of Pavlovites and Gorodzovia in the Pechora River Basin (Golbert et al., 1977) are not reliable.