The purpose of this study is to provide geologic information important in assessing ground-water resources and siting water wells in the Snyderville basin. This geologic study was one phase of a cooperative and more comprehensive water-resource investigation. Subsequent phases conducted by the U.S. Geological Survey Water Resources Division (USGS WRD), focused on the hydrology of the Snyderville basin. The information presented in this report is generalized and is not intended to substitute for site-specific investigations. Future detailed studies will add to the understanding of the geology and ground-water resources of the study area and supplement the information presented herein. 59 pages + 15 plates

This report summarizes the bedrock geology of the western part of the northern Wasatch Range in eastern Box Elder County, Utah , and its relation to ground-water resources. The southern part of the northern Wasatch Range is herein informally designated the Willard mountains; the northern part of the northern Wasatch Range is the Wellsville Mountains. Box Elder Canyon is the boundary between these mountains. The work was performed at the request of the Bear River Water Conservancy District and the Utah Division of Water Resources, and represents a preliminary step in the evaluation of groundwater resources in bedrock and their potential development in eastern Box Elder County.

The Kamas-Coalville region is in the Middle Rocky Mountains physiographic province, about 30 miles east of the Wasatch Front urban area. Rapid population growth and increased water use are the impetus for a collaborative study of water resources in the Kamas-Coalville region, which includes geologic and hydrologic components. This study describes the geologic framework of the Kamas-Coalville region, emphasizing geologic features that most strongly influence ground-water occurrence, flow, and development. The main topics include: (1) the stratigraphy and structural geology of bedrock, (2) the nature and geometry of unconsolidated deposits in Kamas Valley, (3) the hydrostratigraphy of the study area, and (4) the structure of bedrock units below Kamas Valley. 55 pages + 15 plates