2OO Lias and Oolites of Scotland. 



from those of Brora and of the English Purbeck strata. 

 In Mull, Lias and Oolites occur, ranging from the Lower 

 Lias to the Upper Oolitic series, overlaid by Lower 

 Cretaceous strata. They are traversed by many dykes 

 and intrusive sheets of basalt, formerly considered as of 

 Oolitic age, but now, as described by Professor Greikie, 

 of Miocene date. 



