THE PERMIAN PERIOD. 195 
made out, and their total thickness is not more than a few 
hundred feet. They consist of sandstones, conglomerates, 
limestones, marls, and beds of gypsum. 
The following diagrammatic section shows the general 
sequence of the Permian deposits in the north of England, 
where the series is extensively developed (fig. 133) :— 
GENERALISED SECTION OF THE PERMIAN ROCKS 
IN THE NORTH OF ENGLAND. 
Fig. 133. 
Z 
4S 
a a Upper Red Sandstones 
ie) | Se ee ae SS Be 
5 a and Marls. 
Ry 
Z 
= 
= 
= 
oe! 2 eee Ge, a ek Re Ge GT - Magnesian Limestone. 
a 
S| 
Q 
= 
Ss 
a = 
------ Marl Slate. 
Z 
a 
= 
= . 
= se aha Lower Red Sandstones 
= and Breccias. 
pe 
ea) 
= : 
) 
_ 
a aoe — Coal-measures. - 
The record of the “fe of the Permian period is but a scanty 
one, owing doubtless to the special peculiarities of such of the 
