Textbook in PDF format The book presents the cyclicity and micro-cyclicity phenomena which occurred during climate changes and during marine transgressions and regressions. As calculated by the author on the basis of geological research, the climatic cycle of the Earth allows a better understanding of climate changes and associated geological processes in the last 20,000 years. In addition, the author discusses the structure of the sub-Quaternary bedrock and analyses complex geological structures of the Baltic Sea Quaternary deposits