L. : Science, 1977. 88 s. + 1 map. The quality of the scan is medium-good. On the basis of facial and historical-geological principles of studying metamorphic complexes, literary and original materials on the petrology of the precambrian of the Kola Peninsula are systematized and analyzed, a map of the facies of regional metamorphism on a scale of 1 : 1000. 000. Three major cycles of regional metamorphism have been identified - Archaean (ancient 3300 million .) years), Kolsko-White Sea, or early Proterozoic (2700-2900 million. years), and the Pecheng-Warzugian, or Middle Proterozoic (2000-1700 million. years). The regularities of the area distribution of facies of each of the cycles, their petrological features and thermodynamic conditions. are considered. Discusses the relationship between geological and thermodynamic regimes of metamorphism and their evolution in the precambrian region