The article contains a detailed description of twelve lithogenetic types of rocks identified in the composition of the paragenetic association of the Ostrov Berkha reef mass facies: back-reef lagoon, reef flat, reef core, fore reef slope (buttress), fore reef and pinnacles. The article provides information on the structure and texture, mineralogical-petrographic and chemical fea-tures of the reef composition and surrounding sediments. The analysis of the structure of facies zones and features of their lateral changes allowed creating a model of the reef mass structure.
Provenance of the building stone used in wall roods of historical churches of Velikiy Novgorod was studied. All roods are made of pale rose to white limestone containing Brachiopoda shell detritus. The physical characteristics and petrography of limestone correspond to the Semiluksky regional horizon of the Russian platform.
