Меловой период

Nedolivko N., Perevertailo T., Barkalova A., Dolgaya T. (2015) Textural and structural features, composition and formation conditions of arenaceous rocks in PK1 horizon, Pokursk suite n south-eastern Pur-Tazovsk area (Yamalo-Nenets Autonomous Territory) // IOP Conf. Series: Earth and Environmental Science 24 012021 doi:10.1088/1755-1315/24/1/012021

http://iopscience.iop.org/1755-1315/24/ ... 012021.pdf