Впервые выделен и описан этап сильнейшего в нашей эре многофакторного природного катастро-физма на Камчатке, датированный 0-650 гг. Его главными компонентами были: последние к настоящему времени катастрофические извержения ...

Acritarchs are a group of organic-walled vesicular microfossils interpreted as protists, and are among the first eukaryotes preserved in the fossil record. Taxonomic inconsistencies amongst acritarch workers have made it ...

A lack of direct spectroscopic evidence linking cations to the clay mineral structure is a primary reason for many ambiguities regarding the location and structure of the binding sites. This study attempts to obtain such ...

Single phase rutile-cassiterite solid solutions (Sn(1-x)Ti(x))O2 with x = 0.00, 0.15, 0.30, 0.47, 0.70, 0.90, 0.99, 1.00 were synthesized above the solvus temperatures in the system SnO2-TiO2, cassiterrite-rutile, from ...

More than 200 000 ring-width measurements from 384 trees were obtained for 20 individual sites ranging from the lower to upper local timber-lines in the Northwest Karakorum of Pakistan and the Southern Tien Shan of Kirghizia. ...

Interaction of dissolved aqueous species with natural organic matter (NOM) is thought to be important in sequestering some species and enhancing the transport of others, but little is known about these interactions on a ...

133Cs MAS NMR of Cs-exchanged illite, kaolinite, boehmite, and silica gel is shown to be a powerful tool to investigate the adsorption sites and atomic dynamics of Cs on mineral surfaces. Cesium is adsorbed on these mineral ...

13C-enriched glasses of albite, nepheline, and sodamelilite compositions were quenched from melts at 1350–1625°C and 10–35 kb, and studied using 13C and 27A1 MAS NMR. Distinct resonances for molecular CO2 and carbonate ...