10 Johns: The Yoredale and Pendleside Series. 
with the massif. As traced eastwards through Fountains 
Fell, Penyghent and Ingleborough the distinction between 
the Upper and Lower Yoredale Limestones with the Flagstone 
Series that divide them can be made out easily. 
On Ingleborough the Cam or Main Limestone is a conspic- 
uous feature, the Flagstone Series below is of great thickness,. 
while the Lower Yoredale Limestones below, though somewhat 
thin, are to be distinguished, and the whole series is of con- 
siderable thickness, though less than that of Wensleydale. 
It is important to note that on Ingleborough there is no ten- 
dency for the Lower Yoredale Limestones to fuse with the 
massif ; they are, however, reduced in thickness and, having 
regard to the thickness of the intervening shales, they might 
with propriety, be termed “ shales with Limestones.”’ 
Mr. Tiddeman, whose intimate knowledge of the region 
gives considerable weight to the opinions he expressed, was 
struck with the difference between the succession he observed 
north and south of the Craven Faults in the two areas which 
Phillips had previously indicated as northern and southern 
types. Phillips himself was by no means clear when comparing 
the two areas, and Mr. Tiddeman suggested that the Craven 
Faults, the great East and West Series.of fractures dividing 
the two, were moving in Carboniferous times, and suggested* 
the following correlation :— 
SOUTHERN OR BOWLAND TYPE. NORTHERN OR YOREDALE 
TYPE. 
Millstone Grit ae ae .. Millstone Grit 
Bowland Shales ) 
Pendleside Grit (inconstant) .. | eS Sees 
Pendleside Limestone (with reefs) ) 
Shales with Limestones .. .. + Carboniferous Limestone 
Clitheroe Limestone (with reefs) 
Against this view Dr. J. E. Marr in an important paper, ft 
brought much evidence forward to prove that orogenic move- 
ments, acting subsequently to the deposition of the strata,. 
were responsible for the differences in the apparent succession 
of the two areas, and put forward a correlation table, differing 
from that of Mr. Tiddeman, which is given here again :— 
SouTH SIDE. NORTH SIDE. 
Millstone Grit a: ..  Mullstone Grit. 
Bowland Shales... .. Shales above Upper Scar (Main): 
Limestone. 
Pendleside Limestone .. Upper Scar (Main) Limestone. 
Shales with Limestones .. Yoredale Shales with Limestones.. 
Clitheroe Limestone .. Lower Scar Limestone. 
* Report, British Association, 1899, p. 600 et seq. 
+ O.J.G.S., 1899, p. 327 et seq. 
Naturalist,. 
