The Prelude began with the origin of Metazoa, perhaps between 720 and 660 million years ago (mya), and ended with the geologically abrupt appearance of crown bilaterian phyla that began between 530 and 520 mya. The origin ...

The Paleozoic fold belt of southern Mongolia includes two systems, the Variscan (South Mongolian) and the Indosinian (Inner Mongolian or East Gobi). The first arose in the Early Carboniferous in the area of an old ocean ...

The effect of ultrasounds on natural macroscopic vermiculite flakes has been studied. Conditions for the preparation of submicron vermiculite particles of narrow particle-size distribution by sonochemistry are described. ...

A new type of organoclays was synthesized by a novel one-step-synthesis procedure using urea decomposition. The resulting organophilic material is a highly crystalline smectite with stevensite structure and dimethyl ...

Cobalt (II) and Al (III) layered double hydroxides were precipitated from homogeneous solutions using urea hydrolysis under hydrothermal conditions. The particle sizes were controlled successfully by changing the reaction ...

Porous carbons rich in mesopores and with large pore volumes have been prepared by polymerization and carbonization of a carbon precursor, sucrose, within a matrix of the natural clay, halloysite. The carbon precursor was ...

The feasibility of in-situ fluorination of sulfide minerals for sulfur isotope analyses has been demonstrated. Laser fluorination of powdered samples, previously analyzed by conventional bulk SO[sub 2] or BrF[sub 5] methods, ...

The variations of phase and amplitude of LF signal propagating from the transmitter JJY (40 kHz, Fukushima prefecture, Japan) are analyzed. The receiver is situated in Petropavlovsk-Kamchatski (Russia). The time interval ...

In the framework of the Russian-French project, a series of geodesic stations for studying present-day crust deformations by the GPS method was organized on the Baikal geodynamic test ground. Processing of data of 3-year-long ...

The reservoir system of the Manych River basin is located in the Kuma–Manych Depression of the southern Russian region, which is characterized by an arid climate, a shortage of water resources, and the development of salt ...