GEOLOGIYA I GEOFIZIKA, 1999, V 40, N 10, October.


PALEONTOLOGY AND STRATIGRAPHY

Sokolov B. S. Geobiochronological studies of the Riphean and Vendian in the context of search for Precambrian hydrocarbons 1389 Meledina S. V. Ammonites from the boreal Upper Bathonian on Kotel'nyi Island 1397 Korovnikov I. V. Morphology of the Lower Cambrian family Ellipsocephalidae (trilobites) in the northwest of the Siberian Platform (Khorbosuonka River) 1405 Fedoseev A. V. Distribution of the family Ptychagnostidae (trilobites) in the Amydai section of the Amgaian stage (northeast of the Siberian Platform) 1411 Krukover A. A. Microteriofaunal reconstruction of the Kazantsevo interglacial climate in the south of West Siberia 1425

PETROLOGY, GEOCHEMISTRY, AND MINERALOGY

Latypov R. M., Mitrofanov F. P., Alapieti T. T., and Kaukonen R. J. Petrology of the upper layered horizon of the West-Pansky Tundra intrusion (Kola Peninsula, Russia) 1434 Ryabov V. V. Fluid regime of trap magmatism and ore formation (petrological aspect) 1457 Polyakov G. V., Tran Trong Hoa, Akimtsev V. A., Balykin P. A., Ngo Thi Phuong, Hoang Huu Thanh, Chan Quoc Hung, Bui An Nien, Tolstykh N. D., Glotov A. I., Petrova T. E., and Vu Van Van. Ore and geochemical specialization of Permo-Triassic ultramafic-mafic complexes in North Vietnam 1474 Tauson V.L. Isomorphism and endocrypty: novel approaches in studies of behavior of microelements in mineral systems 1488

GEOPHYSICS

Timofeev V. Yu., Anisimova L. V., Ducarme B., Sarycheva Yu. K., Gridnev D. G., and Masal'skii O. K. Effective viscosity of the crust estimated from tilt measurements in the zone of the Major Sayan fault 1495

BRIEF COMMUNICATIONS

Shimaraev M. N., Domysheva V. M., Verbolov V. I., Granin N. G., Zhdanov A. A., Gnatovskii R. Yu., Tsekhanovskii V. V., Gorbunova L. A., Semovskii S. V., and Korovyakova I. V. Hydrophysical processes and distribution of dissolved silicon in Lake Baikal 1502 Vishnevskii S. A., Pal'chik N. A., and J. Raitala Diamonds in impactites of the Lappajärvi astrobleme (Finland) 1506

DISCUSSION
Bulgatov A. N. Probable tectonic nature of the pre-Cenozoic sedimentary complex of the Southern basin of Lake Baikal 1511
RECENSION

Lazarenkon V.G. The book of D.A.Dodin, L.V.Oganesyan, N.M.Chernyshov, and B.A.Yatskevich "Platinoid mineral potential of russia on the eve of the XXI century" 1517