On the age of Devonian polymeric alluvial deposits in Timan

Analysis of mineral composition of Timan placers peculiarity and comparison between the structure of the Yarega placer and Pizhma and Ichetyu placers show their qualitative analogy. This similarity is especially underlined by storeys. All of them are the products of the equal Devonian process of the crust- and placerformation. It is suggested to consolidate the Pizhma and Ichetyu placers, like Yarega, into the united Umbinsko-Srednenskoe field, which consists of the lower - Pizhma and higher - Ichetyu placers.The Pizhma placers age is specified as early- Devonian (Еmsian). It is confirmed by the age of the Timan Devonian bauxites.