Report on the geology of the Henry Mountains

An award‑winning 19th‑century field study, this report follows geologist G. K. Gilbert as he climbs the isolated Henry Mountains of the Colorado Plateau. Freed from the usual constraints of travel planning, he spends two months mapping rock layers, recording striking outcrops, and sketching the interplay of uplift and erosion that sculpts the range. His candid preface reveals both the excitement of discovery and the practical limits imposed by snow‑bound winters.

The narrative blends meticulous scientific detail with vivid descriptions of the desert sky, turquoise basins, and towering buttes, supported by careful diagrams that bring the terrain to life for the ear. Readers hear the collaborative spirit of the U.S. Geological Survey, with insights from colleagues such as Powell and Dutton enriching the analysis. Whether you are a geology enthusiast or simply curious about how early explorers decoded the planet’s inner story, this listening experience offers a clear, engaging window onto a pivotal moment in American earth science.