Soil-forming rocks are the key to understanding the soil formation uniqueness in West Transbaikalia

In the article the peculiarities of soil-forming rocks of West Transbaikalia on the example of sandy deposits of Barguzin basin was considered. Studies have shown that the pH of the upper sand strata (n=59) is 8,8±0,04 95% confidence interval - 8,7-8,9. Studies have shown the upper sand strata pH (n=59) is 8.8±0,04 and 95% confidence interval is 8,7 and about 8,9. The alkalinity of the studied rocks is associated with the specifics of the world's largest Angara-Vitim batholith. In the mountainous framing of Barguzin depression batholith is represented by the Barguzin high potassium calc-alkaline, by Chivyrkuisky calcalkaline and by transitional Zazinsky complexes of rocks. Alkaline background of rocks everywhere inherited by soils, violates the classical scheme of their development and creates difficulties in the taxonomy of the soil diversity, especially in the forest and forest soils are formed under forests on the alkaline sands. In the study of the soils of Western Transbaikalia, soil scientists should take into account the particular properties of alkaline A-type granites.