J. E. Marr (1857–1933) was a renowned British geologist known for his significant contributions to the field of stratigraphy—the study of rock layers and layering. Marr's seminal work, 'The Principles of Stratigraphical Geology,' first published in 1896, has been a cornerstone in the field, offering insights into the geological history of the Earth by detailing the principles of succession and chr...