248 Proceedings of Indiana Academy of Science. 
Lorraine shales deseribed above. These were sufficiently striking, however, 
to indicate that all such weathering agencies as the above, probably have 
much more to do with the widening of valleys in native rock formatior 
than has been generally conceded. 
rd 
Photo showing character of materials at a and b. 
Rough Sketch of Bed of Clifty Creek Showing Special Feature of b. 
