60 THE JOURNAL OF GEOLOGY. 
creek enters into Brush creek. It will be noticed that the good 
wave marks were those running north and south or more nearly 
in this direction; those running more northeasterly or north- 
westerly were poor. This probably means that the strongest 
brunt of the waves and freest exposure to the sea lay directly 
westward at this point. Going up Brush creek, at a locality 
not far distant from the junction of the Elk Horn creek a 
layer showing wave marks was found. These were not recorded, 
but are believed from memory to have run north 30° west. 
Observations by Nelson W. Perry and Joseph F. James.—Wave 
marks and raindrop impressions occur at Smiley’s dam on Four- 
Mile creek, near Oxford, Ohio, at a level 600 feet above the Mt. 
Pleasant beds. On the Little Four-Mile creek, at Ridenour’s 
Mills, wave marks occur, going up stream. Mud-cracks are 
found in Dearborn county, Indiana, 600 feet above the Mt. 
Pleasant beds. These occurrences probably belong therefore to 
the Upper Hudson of Kentucky geologists. 
AuG. F. FOERSTE. 
(To be continued.) 
