The study results include concentrations of Rare Earth Elements and stable isotope compositions of water from an acid mine drainage-affected watershed in southwest Colorado, the Upper Animas River watershed. This dataset is not publicly accessible because: The data will be released by another Federal Agency, USGS. It can be accessed through the following means: The data has been released to the U.S. Geological Survey's ScienceBase Catalog and may be accessed by the following link: https://doi.org/10.5066/P9OOHY1Q. Format: The data will be released through the U.S. Geological Survey's ScienceBase Catalog [https://www.sciencebase.gov/catalog/] The primary USGS author, Conor Newman, is developing the data release using the USGS procedures for documenting scientific data.

This dataset is associated with the following publication: Newman, C., R. Cowie, R. Wilkin, and A. Navarre-Sitchler. Tracing metal sources and groundwater flow paths in the Upper Animas River watershed using rare earth elements and stable isotopes. Geochemistry: Exploration, Environment, Analysis. Geological Society of London, London, UK, 25(1): 2024-23, (2025).