Report on the Geology of the Henry Mountains

by Grove Karl Gilbert


A landmark in American geology and scientific exploration, Report on the Geology of the Henry Mountains is a groundbreaking 19th-century geological survey that forever changed our understanding of igneous formations and mountain building.

Written by pioneering geologist Grove Karl Gilbert, this classic scientific work documents his detailed field studies of the remote Henry Mountains in southern Utah. Through careful observation, mapping, and analysis, Gilbert introduced the revolutionary concept of laccoliths—reshaping the study of volcanic intrusions and structural geology.

This historic geology book is essential reading for:

Geology students and earth science enthusiasts

Historical geology and stratigraphy researchers

Structural geology and igneous rock scholars

American West exploration history readers

US Geological Survey history collectors

Academic libraries and natural science archives

Blending scientific precision with vivid descriptions of the rugged American frontier, Gilbert’s report stands as a foundational text in physical geology, geomorphology, and tectonic theory. His meticulous documentation of rock formations, sedimentary layers, and volcanic intrusions remains influential in modern geological science.

Report on the Geology of the Henry Mountains is more than a government survey—it is a cornerstone of earth science literature, a classic geology reference book, and a must-have for anyone interested in mountain formation, volcanic structures, and the geological history of the American West.

Discover one of the most important geological survey reports ever published—an enduring classic in scientific literature and earth science exploration.