Taxonomy and Evolution of Visean-Roadian (Late Mississippian-Guadalupian) Lasiodiscidae the Carboniferous (Visean Stage, Mississippian Subsystem) to Permian (Roa-dian Stage,
Guadalupian Series) beds
Structural and textural features of felsic volcanics of sarbay formation (the South Ural)The main results of microscopic studying of samples of the felsic
volcanic of sarbay formation (O
CONTENT AND RATIO OF GROUPS AND FORMS OF IRON COMPOUNDS IN THE VOLCANIC SOILS OF COSTA-RICACONTENT AND RATIO OF GROUPS AND FORMS OF IRON COMPOUNDS IN THE
VOLCANIC SOILS OF COSTA-RICA
The magnetite laves in volcanic rocks from Valerianovsky synclinoreThe magnetite laves in
volcanic rocks from Valerianovsky synclinore