AN UPDATED 1:24,000-SCALE GEOLOGIC MAP OF THE CORE VISITATION AREA OF THE CRATERS OF THE MOON NATIONAL MONUMENT AND PRESERVE INCLUDING 38 POINTS OF GEOLOGIC INTEREST

The Craters of the Moon National Monument and Preserve (CRMO) in South-Central Idaho, located near the northern extent of the Basin and Range Province and along the northwest trending Great Rift, consists primarily of basaltic lava fields and volcanic cones that range in age from 15 to 2 Ka (Kuntz, 1989). Geologic mapping of the CRMO region at a scale of 1:24,000 by Kuntz et al., originally published in 1989, has since gone out of print. Geologic observations made by numerous GeoCorps participants working in CRMO between 2004 and 2009 have resulted in several new geologic interpretations for features originally mapped by Kunz et al. (1989). In order to make available to the public a detailed geologic map covering the core visitation area of CRMO that incorporates these new interpretations as well 38 points of geologic interest, an up-to-date, 1:24,000-scale geologic map covering the core area of CRMO has been produced. This work was accomplished using an unpublished, digitized version of the Kuntz et al. (1989) geologic map, which was incorporated into a geodatabase and symbolized using representations in accordance with the FGDC Digital Cartographic Standard. This finished product, which covers approximately 100 km² of CRMO, will be made available to the public at the CRMO visitor’s center.