Wavelet analysis of logging data for the Baikal bottom sediments

An attempt is made to study the cyclicity (periodicity) of the Earth's evol ution processes, which may be expressed in the structure and state of geolo gical section. A particular purpose of this work was to reveal periodical c hanges in the environment and climate of Central Asia by analyzing the logs obtained from the boreholes drilled in the Baikal bottom sediments (Intern ational Baikal Drilling Project). A basic method for revealing the cyclic s tructure of the signal was the body of wavelet analysis. The obtained analy tical data correspond to the known periods recognized by M. Milankovitch an d suggest that the Central Asian climate varied to show cycles of 13-14, 16 -27, 35-57, and 75-120 ka.