How Coal Forms and Coal Rank Diagrams
Copyright and Permission
The following diagrams are free to use for educational purposes. These images were created by Stephen Greb, Kentucky Geological Survey, University of Kentucky. Please cite if using in a presentation or publication. We would appreciateitif you could e-mail Mike Lynch to inform him of the use of the images. Please contact Mike Lynch or Stephen Greb at the Survey for permission to use for other purposes.