Philmont Country: The Rocks and Landscape of a Famous New Mexico Ranch

U.S. Geological Survey, Professional Paper 505

by G. D. Robinson, A.A.Wanek, W. H. Hays and M. E. McCallum

This report is available as a pdf below


This book is an informal account of the geology of the Philmont Ranch quadrangle, where the Southern Rocky Mountains meet the Great Plains in northeastern New Mexico.

From time to time the U.S. Geological Survey publishes nontechnical accounts of the geology of places visited by large numbers of people, such as the National Parks and Monuments. The Philmont Ranch quadrangle is such a place. Its stirring scenery and romantic past attract many thousands of visitors each year, and thousands more discover it as they travel to better-known Taos and Santa Fe on U.S. Highway 64. Moreover, half the quadrangle is occupied by the Philmont Scout Ranch, which is visited by several thousand adults annually for training in Scout leadership, and by many thousands of Explorer Scouts each summer for protracted camping expeditions. The quadrangle is part of a region that, because of its known and potential mineral wealth, has been under investigation by the U.S. Geological Survey for many years. Some of the technical data thus assembled are here recast in a form that we hope will be of interest and use to those who visit the area.

Table of Contents

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