History 430: Theory and Practice
Early mining is critical to understand how it set the stage for the tri-state district of Oklahoma, Kansas, and Missouri to become one of the world's foremost produces of lead and zinc ore from approximately 1880-1950. The particular geological deformation of this region led to prospecting and mining on a hyper-industrial level with the focal point being in and around the Picher-Cardin district of northeastern Oklahoma in Ottawa County. From the initial discovery of lead and zinc ore through the boom and output peak of 1929, the tri-state region saw the discovery, boom, mining techniques, and technological advancements in this dynamic and relatively short era of industry.
Janssen, Charles E., "Early Prospecting of the Tri-State District and How it Affected the Picher Field" (2011). Theory and Practice: Hist 430. 17.