Mazaevella gen. nov.—A New Genus of Pectinida (Annuliconchidae, Bivalvia) from the Gzhelian–Sakmarian of European Russia
Polymineral Biomorphoses in Basal Skeletons of Hypercalcified Sponges and Fusulinid Shells from the Gzhelian Stage of the Moscow Basin
Mixed-Layer Glauconite-Nontronite Clay Minerals from Biomorphoses and Host Rocks of the Gzhelian Stage (Moscow Region)