Geology Column Page – Grand Canyon River Guide

This sample page from Belknap’s Grand Canyon River Guide offers a detailed look at the canyon’s iconic rock layers through a beautifully illustrated geology column. Designed to help river runners and geology enthusiasts identify formations from river level, the page breaks down the ancient story of the Colorado River’s path through time. From the Vishnu Schist at the bottom of the canyon to the Kaibab Limestone at the rim, each formation is clearly labeled and explained in an easy-to-understand format. This educational resource showcases the quality and clarity found throughout the full guidebook—built for both planning and on-river reference. Whether you're a first-time rafter or a seasoned guide, this geology column brings deeper appreciation to every bend in the river. It’s a perfect preview of the guide’s blend of science, illustration, and practical use.  Also available as a full size poster.