1. Maps showing locations of known Mississippi Valley-type deposits and occurrences in the Ozark Mountains region relative to late Cambrian shaly lithofacies, and other shales, Missouri, Arkansas, Kansas, and Oklahoma Yale Public content 1997. 2002-06-01T04:00:00Z. 2004-04-05T13:49:07Z. Geological Survey (U.S.). U.S. Geological Survey ; For sale by Geological Survey Information Services. English. Public. Arkansas, Harrison Region, Ozark Mountains, and Missouri. Cambrian.