Sacagawea and her son travelled with the Lewis and Clark expedition. Hematite colors (in the sky of this painting) are more prevalent in warmer climates or where soil has preserved a record of warmer climates from earlier geologic times. Hematite (Greek for blood-like) adds rich red tints. In general, goethite soil colors occur more frequently in temperate climates, and the smaller goethite crystals produce shades of brown. Large hematite crystals give a purplish-red color to geologic sediments that, in a soil, may be inherited from the geologic parent material.