Problems of Siderite Formation and Iron Ore Epochs: Communication 1. Types of Siderite-Bearing Iron Ore Deposits V. N. KholodovG. Yu. Butuzova OriginalPaper Pages: 389 - 411
The South Ushkoty Eluvial Kaolin Deposit in the Southeastern Orenburg Region B. F. GorbachevA. F. SharapovN. T. Shmel'kov OriginalPaper Pages: 412 - 424
Metacarbonate Rocks (Calciphyres) of the Lapland—Kolvitsa Granulite Belt, Baltic Shield V. T. SafronovO. M. Rosen OriginalPaper Pages: 425 - 436
Upper Oligocene Sediments of the Ciscaucasus, Volga—Don, and Mangyshlak Regions (Central Part of the Eastern Paratethys): Communication 3. Metal Potential and Formation Conditions of Fish Bone Detritus and Iron Sulfide Deposits A. S. StolyarovE. I. Ivleva OriginalPaper Pages: 437 - 453
The Khubsugul Phosphate-Bearing Basin: New Data and Concepts A. V. Ilyin OriginalPaper Pages: 454 - 467
Transformation of Hydroxyapatite of Bone Phosphate from the Ocean Bottom during Fossilization J. G. NemliherG. N. BaturinI. O. Murdmaa OriginalPaper Pages: 468 - 479
Sedimentological Interpretation of the Tonto Group Stratigraphy (Grand Canyon Colorado River)1 G. Berthault OriginalPaper Pages: 480 - 484