The Principles of Stratigraphical Geology

"The Principles of Stratigraphical Geology" by J. E. (John Edward) Marr is a guide for geology students trying to understand Earth's past through rocks. The book explores strategies to organize rock layers in the correct order and date them correctly. It shows how early geologists worked to unravel the history of Earth, studying layer after layer. The book looks at the difficulties of assembling a complete picture from our planet’s imperfect geological record of sedimentary rock layers. It highlights geological periods and avoids old ideas about catastrophic resets in Earth’s history, and strives to build a foundation for later chapters discussing geological rules and procedures.