For more than a dozen years, the Geologic Resources Branch of the National Park Service has been carrying out an inventory of geologic resources in all the units in the system. NPS produces three publications as part of the Geologic Resources Inventory Program: Scoping Summaries, Geologic Reports, and Digital Geologic Maps. A table with links to the completed reports is now online. AZGS is currently mapping the surficial geology in parts of Organ Pipe Cactus National Monument west of Tucson, in partnership with NPS. There is a lot more work to do nationwide and in Arizona, but it's a fantastic program with valuable and important results.
18 hours ago