A collaboration between the California Geological Survey and the USGS, the Sierra Nevada Earth Science Atlas “provides the most detailed geologic framework mapping of California’s most iconic landscape to date. This web page hosts the numerous maps, data layers, and an associated report that make up the Atlas. Collectively, these layers and report show and describe the geology of the Sierra Nevada, a prominent mountain range that extends roughly north-south across eastern California and into a small portion of western Nevada, along with adjacent areas.” At the moment the Atlas consists of a geologic map plus appendices, along with a data package containing a number of map layers, with more to be added in the future.