Geology and mineral resources of the North-Central Montana Sagebrush Focal Area: Chapter D in Mineral resources of the Sagebrush Focal Areas of Idaho, Montana, Nevada, Oregon, Utah, and Wyoming (original) (raw)

area is low, and is not like the high-quality samples from southwestern Montana or Arizona. Furthermore, the lack of other claims in the study area, and the absence of previous assessments or citations in the published literature, suggest that significant resources of gem-quality petrified wood are unlikely to be present in the study area. Land Management, 1985, 1994) for mineral assessments and mineral reports. The information and interpretations provided herein relied on the best publically available data and information sourced from Federal and State agencies, academic literature, and company reports.