The Quarterly journal of the Geological Society of London, v. 11 (1855), London, geology, periodicals, The illustration depicts a geological cross-section that outlines the stratigraphy of a specific region, labeled as 'Fig. 1.' It indicates various geological layers and formations, with annotations detailing their names and characteristics. The vertical axis represents depth, while the horizontal axis conveys the geographical orientation and location. This diagram likely serves as a visual explanation of the geological structure encountered during a field trip documented in the 'Proceedings of the Geological Society.' Each layer is meticulously categorized, providing insights into the composition and historical context of the geological features.