Siberia eastern

World potassium reserves. The world reserves of K are now estimated at over 48 Pg of recoverable K2O. Canadian deposits represent 37% of the world s known reserves, Russian deposits 49%, and the remainder is distributed among the United States, Europe, Asia, Africa, smd South America (Adams, 1968). There are unproven deposits of K salts in Tunisia and Libya, as well as subsurface brines in Niger and Nigeria. Undoubtedly there are other significant reserves as yet undiscovered in sparsely explored areas, such as Central America, Siberia, eastern Canada, and Australia. 

Selenium deficiency has been identified iu humans iu a broad area of China, stretching from the northeast to the southwest. Two syndromes are evident Keshan disease, an endemic cardiomyopathy which affects children, and Kashin-Beck disease, an edemic osteoarthropathy (big-joiat), also mainly involving children, which occurs iu eastern Siberia and parts of China. As a result of these observations, a protective effect for selenium has been proposed, and various selenium-containing preparations have been appHed to preserve animal and human health. 

Clearly, aeolian processes were much more important at that time than at present. Large parts of the present temperate zone, from the cover sands of the Netherlands to the sand dunes in north-east Siberia are Ice Age (aeolian) sands. South and east of this cover sand belt lies a belt of loess deposits, extending from France, across Belgium, the southern Netherlands, Germany and large parts of Eastern Europe into the vast steppes of Russia, and further east to Siberia and China. A similar east-west loess belt exists in the USA and less extensive areas occur on the Southern Hemisphere, e.g. in the Argentinean pampas. 

Figure 13.11 is one example of variations in total column ozone in Europe, Eastern Siberia and the Far East, and Western Siberia (Bojkov et al., 1994). These data have been smoothed using a 12-month running mean, but variations due to the QBO etc. have not been removed. Figure 13.11c shows for the Western Siberia data the deviations specifically attributed to the QBO while this contributes to a significant extent to the observed trends, it clearly does not account for the entire downward trend in total ozone with time. 

FIGURE 13.11 Percentage variations in total column ozone smoothed using a 12-month running mean for a network of stations in (a) Europe, (b) Eastern Siberia and the Far East, and (c) Western Siberia from 1973 to March 1994. The arrows show the expected QBO. In (c) the dashed line shows the component that has a periodicity expected for the QBO (adapted from Bojkov et at., 1994). 

Barskii, V.D., Marakushkina, V.K. Meshakova, N.M. (1972) Hygienic evaluation of the working conditions and health of workers employed in the production of chloroprene rubber in eastern Siberia. Nauch Tr. Irkutsk, med. Inst, 115, 5-8 (in Russian)... 

Laumontite-Heulandite Associations in the Coal-Bearing Series in Eastern Siberia... 

The Fly Agaric mushroom (Amanita muscaria) was the earliest fungi species recognized as having psychoactive potential. It was used by shamans in Siberia and in an area along the eastern part of the U.S.-Canadian border and may have inspired the world s earliest religious text, the Rig-Veda. Panther Caps (Amanita pantherina) contain psychoactive principles similar to those in Fly Agarics, which are drawn here about half natural size. 

Glaser S. M., Foley S. F., and Gunther D. (1999) Trace element compositions of minerals in garnet and spinel peridotite xenoliths from the Vitim volcanic field, Transbaikalia, eastern Siberia. Lithos 48, 263 —285. 

Huh Y., Tsoi M.-Y., Zaitsev A., and Fdmond J. M. (1998) The fluvial geochemistry of the rivers of Eastern Siberia I. Tributaries of the Lena river draining the sedimentary platform of the Siberian Craton. Geochim. Cosmochim. Acta 62, 1657-1676. 

Fowler M. G. and Douglas A. G. (1987) Saturated hydrocarbon biomarkers in oils of late Precambrian age from eastern Siberia. Org. Geochem. 11, 201-213. 

In addition to these dramatic reversals of polarity. Earth s magnetic poles have also wandered. About 300 million years ago, for example, the north magnetic pole was located in the eastern region of Siberia. It then traveled northward to the northern coast of Siberia, along to the coastline to Alaska, and then northward to its present location. 

Eastern Siberia Hematite-jasper Lenses in zone,... 

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