'MAI-. X 





or may gently undulate over t distance of many miles. 

 Hence it is sometimes cut by denudation into detached 

 outliers ; and the extraordinary result is thus obtained of 

 hills and ridges capped by patches of displaced rock of 

 vastly higher antiquity than those which underlie them. 

 The Cretaceous and Tertiary regions of the south 





i 



of England, which have been cited as affording examples 

 of reversed faults, furnish also some good illustrations of 

 thrust-planes. On the foreshore at Eastbourne, on the 

 chalk cliffs east of Swanage, and again to the west of 

 Lulworth Cove, the Cretaceous formations may be seen 

 to be traversed by lines of dislocation, sometimes nearly 

 horizontal, where lower portions of the strata have been 

 pushed up over higher. 



Some of the most remarkable examples of this 

 ire are those mapped in detail by the Geological 

 Survey in the north-west of Scotland Two figures are 

 here inserted from that interesting but exceedingly 

 complicated region. In Fig. 40 a view is given of the 

 north front of an eminence 2231 feet high, at the upper 

 end of Loch Marcc in Ross-shire. The craggy ground 



