The Principles of Stratigraphical Geology

A scientific publication written in the late 19th century. This work is aimed at students of geology, focusing on the methods and scope of stratigraphical geology, particularly the relationships and chronological ordering of sedimentary rock layers. It highlights the challenges faced by geologists in reconstructing Earth's geological history from imperfect records. The opening of the book introduces the concept of stratigraphy as a way to document Earth's history by identifying the sequence of geological events through rock layers' formation and organization. Marr emphasizes the complexities and interconnectedness of geological periods, rejecting outdated notions of catastrophic resets in Earth's history. He outlines the goals of stratigraphical geology, which are to establish the order of strata and analyze the conditions under which they were formed. This foundational introduction sets the stage for discussing various geological principles and methods in later chapters.