Collecting Badlands 'Brain Coral' Cobbles

摘要

The Bighorn Basin in north-central Wyoming is typical of many inter-montane basins found throughout the Western United States. The basins are filled with Tertiary sediments shed from the surrounding mountain ranges during the Laramide uplifts. The sediments are commonly composed of flat-lying or gently dipping fluviatile and lacustrine conglomerates, sandstones, siltstones and shales. Erosion has uncovered and exposed the layers of sedimentary strata, and the vivid, multicolored exposures have enchanted tourists, photographers and artists for many years.