Idaho Bureau of Mines and Geology Bulletin Craters of the Moon National Monument, Idaho

The writer's appreciation of the warm hospitality and tireless efforts of S. A. Paisley, former custodian of the Monument, can not be too strongly expressed. Mr. Paisley accompanied the writer on many long and tedious trips across the lava beds, with out recompense, in order that the less obvious, though no less interesting features of the area could be described in this paper. During the last ten years he spent much time exploring the area, and many of the caves and water holes were discovered by him. Thanks are due to Mr. and Mrs. Era Martin for hospitality on this trip and during a previous visit to the area. Mr. Martin furnished valuable information on the early history of the area. Acknowledgments are also due to the people of Arco for their cooperation and especially to C. A. Bottolfsen, Editor of the Arco Advertiser.

A colored geologic map of the Craters of the Moon National Monument has been published by the United States Geological Survey.¹

---

¹Stearns, H. T., Crandall, L., and Steward, W. C., Geology and ground-water resources of the Snake River Plain in southeastern Idaho: U. S. Geol. Survey Water-Supply Paper 774, pl. 13, 1938.

---

PLATE XXI—Hoodoo Water Hole, in the serrate aa lava flow, where water only 1° or 2° above the freezing point can be found on the hottest summer days. Photograph by H. T. Stearns.