The Geologic Story of Glacier National Park

The text presents geology as the study of Earth processes and products, contrasting internal forces that raise and break the crust with external agents such as water, wind, and ice. It links geological materials to everyday objects to underscore practical relevance and notes that national parks reveal landforms and rock records. Focusing on a particular park, it describes conspicuous color-banded sedimentary strata of limestone, shale, and sandstone and explains major tectonic structures including a prominent overthrust. The account traces repeated glaciations that carved cirques, horns, valleys, and lakes and includes a geologic time chart to interpret landscape evolution.