REPORT OF MEETINGS FOR 1902 



Fig. 2. — Diagram to illustrate the successive stages in the 



crumpling and upheaval of the Silurian and 



Ordovician Rocks. 



Let US, so to speak, take stock at this point, with especial 

 reference to the interval represented by the events that 

 happened after the Gala Rocks of Siccar Point were formed, 

 and before the rocks of St. Abbs Head, the Cheviots, and 

 the Pentlands and Ochils began to be formed. 



In the Lake District, as already stated more than once, 

 twelve thousand feet of old sediments overlie the horizon 

 of the Gala Rocks. Assuming, for argument, that those at 

 the Siccar Point are at the very top of the Gala Rocks — which 

 is by no means the case in reality — we have to account for 

 the time required to accumulate the thickness known to have 

 accumulated in the area referred to. Now it is quite true 

 that we have no very definite data to go upon in this case. 

 All we can do is to assume that the materials of which these 

 rocks were formed were derived from the waste of an ancient 

 land, where they wasted at, say, the rate of one foot in three 

 thousand years (which is much in excess of the average), 



