LITHOLOGY & MINERAL RESOURSE
Vol. 34, No. 5, 1999

Hypotheses of Phosphogenesis and Oceanic Environment
G. N .Baturin 411

Genetic Characteristics of Sands in the Northeastern Gulf of Finland:
Evidence from Grain-Size Distribution
D.V.Ryabchuk 431

Manganese Carbonates in Recent Sediments:
Geochemistry of Isotopes (delta(18) and delta(13)C) and the Origin
V N. Kuleshov 440

Facies and Genesis of Phosphorites from Karatau: Communication 2:
Genesis of Phosphate Pellets and General Evolution of the Tommotian Paleobasin
V N. Kholodov and P.K. Paul 458

Metakomatiites in the Ferruginous-Siliceous Formation Section, Kostornuksha Greenstone Belt
R. L Mil'kevich and N. A. Arestova 471

Some Types of Nodular Jaspers from Accreted
Effusive-Siliceous Oceanic Complexes, Northeast Russia
V. N. Grigor'ev, K. A, Krylov, and V. 1. Murav'ev 478

Relations between Hydrothermal Mineralization and Seismicity of Mid-Oceanic Ridges
R O. Sobolev 492

Short Communications

Problems ofPhosphatic Raw Material in Russia (All-Russian Symposium) 502
World Oil Resources in the 21st Century
Yu. I. Korchagina 505

Chronicle

In Memory of G.F. Krasheninnikov 508

In Memory of A.K.Lisitsin 510

In Memory of N.V. Logvinenko 512