Hyndman and Thomas describe and illustrate the geological features visible in the landscape of Montana, explain their underlying structures, and reconstruct the processes that led to the current formations. They cover the first four billion years; northwest Montana: glaciated valley in faulted belt rock; southwest Montana: isolated ranges, spacious valleys; and central and eastern Montana: vast horizons with buttes and badlands. For each section, they include road guides and a special guide to Glacier National Park. Annotation 2020 Ringgold, Inc., Portland, OR (protoview.com)
