Llandoverian stromatolites on the western slope of the Polar Urals: main morfotypes, microstructure

The first results of the study of lower Silurian stromatolitic structures from the western slope of the Urals are presented. The interval of Filipp”el’ Stage represented by an intercalation of stromatolitic dolostones and thin-bedded to massive more or less sorted stromatoporats and bioclastic dolostones is considered.