The book "Principles of Stratigraphic Geology" by John Edward Marr is a recognized publication dedicated to the study of rock layering and the study of complex processes that occurred in the geological past. The author considers in detail the main theoretical principles of stratigraphy, methods of studying geological rocks and their classification. The book contains important principles and concepts that help to understand and study the deposition of rocks in different epochs of the Earth's geological history. "Principles of Stratigraphic Geology" is a necessary source of information for students of geological faculties, scientists and everyone who is interested in the history of the development of our planet through the prism of geological processes.