Written by a career geologist with decades of experience in the field, North America’s Natural Wonders provides everything the reader needs to understand the landscape. It guides readers through the most iconic, geologically significant scenery in North America, points out features of interest, explains what they are seeing, and describes how these features came to be. Presented as classic excursions to some of the best-known natural wonders on the continent, Volume I focuses primarily on Western North America, including the Canadian Rockies, California, the Southwest, Great Basin, and Tetons-Yellowstone Country. The trips detailed in this volume include stops at quintessential features, such as the glaciers and mountains of Banff National Park, Yosemite, the vineyards of Napa Valley, the California goldfields, the Grand Canyon, numerous parks in Utah, the geysers and hot springs of Yellowstone National Park, as well as many others. It also features discussions of lesser-known but equally interesting geologic formations and important information on accessing these sites. Features Addresses issues of interest, such as fossils, earthquakes, mineral sites, mining, and oil fields Lavishly illustrated with numerous colorful maps and breathtaking geological landscapes and their various features These five self-guided tours explain to the curious layman, student, and geologist what they are seeing when they look at a roadcut or a quarry and enhances the experience far beyond simple sightseeing.

As the importance and dependence of specific mineral commodities increase, so does concern about their supply. The United States is currently 100 percent reliant on foreign sources for 20 mineral commodities and imports the majority of its supply of more than 50 mineral commodities. Mineral commodities that have important uses and face potential supply disruption are critical to American economic and national security. However, a mineral commodity's importance and the nature of its supply chain can change with time; a mineral commodity that may not have been considered critical 25 years ago may be critical today, and one considered critical today may not be so in the future. The U.S. Geological Survey has produced this volume to describe a select group of mineral commodities currently critical to our economy and security. For each mineral commodity covered, the authors provide a comprehensive look at (1) the commodity's use; (2) the geology and global distribution of the mineral deposit types that account for the present and possible future supply of the commodity; (3) the current status of production, reserves, and resources in the United States and globally; and (4) environmental considerations related to the commodity's production from different types of mineral deposits. The volume describes U.S. critical mineral resources in a global context, for no country can be self-sufficient for all its mineral commodity needs, and the United States will always rely on global mineral commodity supply chains. This volume provides the scientific understanding of critical mineral resources required for informed decisionmaking by those responsible for ensuring that the United States has a secure and sustainable supply of mineral commodities.