44 



MR. E. W. BINNEY ON THE 



Bentley Brook Section. 



(Distance about a mile.) 



Bridge over 

 Bentley Brook. 



w. 



Harrock Hill. 



E. 



A little distance to the east of the last-named locality 

 is another interesting permian section, not far from Bisp- 

 ham School. The rough rock is seen capping Harrock 

 Hill, and dipping south at an angle of 25°; and on the 

 inferior part of it the Haslingden or lower flags are found ; 

 but as we reach the flat ground below, for some distance 

 east of the road over Bentley Brook, nothing but till is met 

 with for about 500 yards. On the lower side of the bridge 

 is seen a mass of dark-red shaly clays (permian), which, 

 when they make their appearance lower down in the brook- 

 course, dip to the W.N.W. at an angle of 45°. These 

 strata, are about 20 yards in thickness. Then comes a 

 bed of compact limestone, of a reddish-yellow colour, about 

 4 feet in thickness, exactly resembling that seen at Skil- 

 law Clough, and lastly described. Next occur shaly marls 

 of a red colour for about 40 yards, which gradually pass 

 into a bed of red sandstone. These dip W.N.W. at an 

 angle of 30°. Then a fault is seen running in a direction 

 from N.N.W. to S.S.E. Near this fault the sandstone 

 is hardened and discoloured; but for 100 yards along the 

 brook-course a soft red sandstone, having pebbles of brown 

 quartz, and evidently trias, is met with. This dips W.S.W. 

 at an angle of 20°. 



These two sections are of considerable interest, as they 

 prove the existence of a magnesian limestone in the west 

 of Lancashire where it had never been seen before. Most 

 probably it is a continuation of the limestone seen at 



