Vols. for 1955-1962 include: Mining guidebook and buying directory.

Footprints in Stone is the definitive guide to the Steven C. Minkin (Union Chapel) Paleozoic Footprint Site in northwest Alabama, the discovery of whose vast quantity of 310-million-year-old fossil tetrapod footprints and other traces is one of the most significant developments in modern paleontology.

Coal will continue to provide a major portion of energy requirements in the United States for at least the next several decades. It is imperative that accurate information describing the amount, location, and quality of the coal resources and reserves be available to fulfill energy needs. It is also important that the United States extract its coal resources efficiently, safely, and in an environmentally responsible manner. A renewed focus on federal support for coal-related research, coordinated across agencies and with the active participation of the states and industrial sector, is a critical element for each of these requirements. Coal focuses on the research and development needs and priorities in the areas of coal resource and reserve assessments, coal mining and processing, transportation of coal and coal products, and coal utilization.

Trends in use and production of barite. A geological summary of deposits. Outlook is favorable for discovery of new deposits to meet rising demand.