The Principles of Stratigraphy (book)

"The Principles of Stratigraphy" is a foundational book that explains how geologists study layered rocks (strata) to understand Earth's history. It introduces key concepts such as superposition (younger layers on top), original horizontality (layers form flat), and cross-cutting relationships (faults or intrusions cut through layers). These principles help scientists determine the relative ages of rocks and reconstruct past environments and events. By examining the order and characteristics of layers, geologists can piece together Earth's geological timeline and evolution comprehensively and systematically.