The book ""Geological Survey of Michigan: Upper Peninsula, 1869-1873 V2: Iron Bearing Rocks"" by T. B. Brooks is a comprehensive study of the geology of the Upper Peninsula of Michigan, specifically focusing on the iron-bearing rocks in the area. The author, T. B. Brooks, was a geologist who worked for the Michigan Geological Survey during the late 19th century.The book is the second volume of the survey, and it covers the period from 1869 to 1873...