Contents

Doklady Earth Sciences

Vol. 495, No. 2, 2020

Geology

The Oldest Vendian (Ediacaran) Fossils of Eurasia: U–Pb Isotope Age of the Basa Formation (Asha Group, Southern Urals)

A. A. Razumovskiy, I. A. Novikov, A. V. Ryazantsev, S. V. Rud’ko, N. B. Kuznetsov and Yu. V. Yashunskiy p. 867  abstract

First Data on the Age (U–Pb, SHRIMP-II) and Composition of Zircon from the Unique Yarega Oil–Titanium Deposit, South Timan

A. O. Krasotkina, S. G. Skublov, Corresponding Member of the RAS A. B. Kuznetsov, A. B. Makeyev, B. Yu. Astafjev and O. A. Voinova p. 872  abstract

A New Approach to Estimation of the Rheological Properties of Seafloor Sediments during the Sampling Process

Corresponding Member of the RAS S. A. Tikhotskiy, N. V. Dubinya and V. A. Nachev p. 880  abstract

Geochemistry

Ultrapotassic Rock from the Tomtor Complex of Ultrabasic Alkaline Rocks and Carbonatites (Arctic Siberia)

Academician N. L. Dobretsov, E. V. Lazareva, S. M. Zhmodik, V. A. Ponomarchuk, A. V. Travin, I. N. Myagkaya, A. V. Tolstov and N. S. Karmanov p. 884  abstract

Geochemical Characteristics and Genesis Analysis of Deju Basalt in Midu County, Western Yunnan

Zhao Ya-Nan, Xiao Qian-Ru, Li Hong-Xiao and Xiao Yuan-Fu p. 888  abstract

Mineralogy

Banded and Rhythmically Zoned Carbonate Veins of the Ag–Pb–Zn Prognoz Depozit (Sakha–Yakutia, Russia): A Result of Self-Organizing Processes

E. Yu. Anikina and Academician N. S. Bortnikov p. 894  abstract

Geophysics

Unprecedented Ozone Depletion in the Arctic Stratosphere during Winter–Spring of 2020

Corresponding Member of the RAS V. V. Zuev, E. S. Savelieva and A. V. Pavlinskiy p. 901  abstract

Temperature Distribution in the Earth’s Mantle

A. P. Trubitsyn and Corresponding Member of the RAS V. P. Trubitsyn p. 905  abstract

Some Challenges of Short-Term Earthquake Forecasting and Possible Solutions

Academician V. G. Bondur, M. B. Gokhberg, I. A. Garagash and D. A. Alekseev p. 910  abstract

Interpretation of Gravity Data Measured by Topography

Corresponding Member of the RAS P. S. Martyshko, D. D. Byzov and A. I. Chernoskutov p. 914  abstract

Reliable Determination of Paleointensity in Igneous Rocks Bearing Thermochemical Remanent Magnetization

V. P. Shcherbakov, N. K. Sycheva and N. A. Afinogenova p. 918  abstract

Satellite Monitoring of Wildfires and Emissions into the Atmosphere of Combustion Products in Russia: Relation to Atmospheric Blockings

Academician I. I. Mokhov, Academician V. G. Bondur, S. A. Sitnov and O. S. Voronova p. 921  abstract