HUGHES : INGLEBOROUGH. 
181 
resembles the beds found in the corresponding position in Wales 
and the South-west of England. After describing the pebbles 
found in the red conglomerate in the Lune valley — the limestones 
which he mentions, I may explain in passing, are fragments of 
Bala Limestone — he adds (p. 14), " By this list \\dll appear the 
limited extent of the current which brought together these 
pebbles — no trace of granite, syenite, porphyry, greenstone, 
amygdaloidal slate, or any of the Cumbrian rocks which are 
remote from the valley." 
" The pebbles vary in size, number, and degree of cohesion 
to the matrix in different beds. . . . They are but feebly 
cemented in the clay and sand, and may be detached by a blow 
of the hammer, leaving a concave smooth impression. In some 
cases I have imagined that one pebble indented another." 
He adds (p. 15), " This intermediate or transition group, 
until lately little noticed by geologists, is of great importance 
in all questions concerning the comparative age of unconnected 
deposits of the older Mountain Limestone Series." 
Professor Sedgwick in his paper on the Lower PaliEozoic 
Rocks at the Base of the Carboniferous Chain between Raven- 
stonedale and Ribblesdale,* says that " At Thornton Force 
there are some traces of calcareous conglomerates immediately 
under, and partly penetrating, the bottom beds of limestone. 
They seem to represent the Old Red Sandstone in a very de- 
generate form, and they disappear in some of the neighbouring 
sections. Indeed, throughout the North of England the Old 
Red Sandstone, even when developed on a far greater scale, is 
generally seen in discontinuous masses." 
In 1886 I led an excursion of Cambridge students to Ingle- 
borough, where we were joined by Professor Lohest, who, on his 
return to Belgium, wrote, in conjunction with his friend and 
master, Professor de Koninck, a short paper on the results of 
his observations.! 
* Quart. Journ. Geol. Soc, vol. viii., 1851, p. 45. 
t Notice sur le parallelisme entre le Calcaire Carbonifere du Xord-ouest 
de TAngleterre et celue de la Belgique par L. G. de Koninck et Maximin 
Lohest. Bulletins de TAcademie Royale de Belgique, 3°*® Serie, tome xi.. 
No. 6, 1886. 
