The study’s novel methodology, carried out collaboratively by the USGS and the Arkansas Department of Energy and Environment’s Office of the State Geologist, made it possible to quantify the amount of lithium present in brines located in a geological unit known as the Smackover Formation. Extracting lithium from brines co-produced during oil and gas operations provides an opportunity to extract a valuable commodity from what would otherwise be considered a waste stream. “Lithium is a critical mi...