530 



PROP. T. M'K. HTJGHES 01^ SOilE 



by tourists or rolled from a pedestal which had perished too far on 

 one side, we could not tell. 



The strise on the surface of the pedestals run about north-east 

 and south-west. 



The boulders on Norber Brow were noticed by Phillips in 1827* 



Pig. 3. — Boulder of Silurian, resting on a striated Pedestal of 

 Mountain Limestone, Norber Broiu, AustwicJc, Yorkshire. 



and again in 1855 1, when he wrote as follows : — " Geologists will be 

 rewarded for inquiring into the remarkable distribution, over 

 limited breadths, and to elevations somewhat exceeding 1200 feet, 

 of blocks of the slaty and calliard masses which fill a large space 

 about Horton in Ribblesdale, and between this place and the village 

 of Austwick. Here they are in situ, occupying what, with reference 

 to the limestone hills around, may be regarded on the whole as a 

 hoUow space between two elevated ranges of limestone, of which 

 the northern is the higher, that on the south being depressed by the 

 Craven Pault. 



" From this hollow, regarded in a general sense, masses of the 

 slaty rocks have been drifted by some force of water to the south- 

 west, south, and south-east, not merely or even mainly by the valleys, 

 but over the high ground, so as to rest on the limestone hills above 



* Trans. Geol. Soc. vol. iii. p. 13. 

 t ' The Elvers, Mountains, and Sea-coast of Yorkshire,' London 1855, p. 111. 



