PLATt IV.— Notes on the Geological History of Blackford Hill 

 and its agates. 



{Photo 



edge;coal outcrops under boulder clay, 



Niddrie Railway Cutting. 



{Photo. 



J. 7. McB.1 



BLACKFORD HILL: THE GLACIATED CAVE, 

 Showing Fault-Line and Brecciated Rock. 



