Plant microfossils of the Hazard No. 7 coal, Perry County, Kentucky

The cooperative mapping program between the Kentucky Geological Survey and the U. S. Geological Survey has yielded a number of interesting and valuable by-products. As a part of the stratigraphic studies involving Carboniferous coal fields, R. M. Kosanke has been involved in a detailed analysis of spore floras from various coal horizons. This study is aimed toward a correlation within the eastern coal field and, eventually, toward more accurate correlations with the western Kentucky coal fields.