662 C. CALLAWAY ON A NEW AREA OF UPPER 



either be thrown down ont of sight, or the anticlinal to which I 

 have alluded has not brought them to the surface. 



The Hollybttsh Sandstone. 



Forming a continuous band between the Shineton Shales and the 

 quartzite which rests upon the TVrekin, is a series of thin-bedded, 

 micaceous, green sandstones, holding the same geographical relation 

 to the Shineton Shales as the Hollybush Sandstone of Malvern holds 

 to the black Olenus-shales. The identification of this rock with the 

 Hollybush Sandstone is placed beyond doubt by the further evidence 

 of Kutorgina cinr/irhta, Bill., which occurs in abundance and in good 

 preservation at Neves Castle, at the south-west end of the "Wrekin, 

 and has also been detected by me near Lawrence Hill, one of the 

 lower elevations of the AVrekin range, where the sandstone has been 

 excavated for the purpose of erecting an ancient tumulus. At this 

 locality I also found the impression of the thorax of a Trilobite, 

 but too imperfect for even generic identification. The sandstone 

 covers an area three and a half miles in length by half a mile in 

 its greatest breadth, its length running parallel to the axis of the 

 Wrekin. The dips are very various. At the north-east end of the 

 area several exposures give a dip averaging 50° to the west-south- 

 west. Near the road ascending from the Wrekin to the Hatch Kiln 

 the dip is 75° to the north-west. One third of a mile to the south- 

 west of this locality, the sandstones dip south-30°-east at an angle 

 of 55°, apparently resting conformably upon the quartzite which 

 immediately underlies them. In a quarry 250 yards from this, 

 the dip is west-30°-soutk, at 35°. At the south-west end of the 

 sandstone area, near Neves Castle, are two exposures, one on the 

 north of the road dipping south-south-east at 50°, and one to the 

 south of the road with a dip of 50° to the south-5°-west. This last 

 locality is the quarry in which Kutorgina cingulata plentifully occurs. 

 The same dip as the last is seen in a quarry to the south of the road 

 from Neves Castle to Long Wood. The sandstone and the shales 

 are found in almost immediate contact in Back Dingle, to the south- 

 west of Neves Castle ; and, south of the road from Neves Castle to 

 Bank's Lane, a stream-section shows the Shineton Shales plunging 

 at an angle of 65° towards the sandstone. I have already (p. 661) 

 given reasons for concluding that the Shineton and the Hollybush 

 are separated by a fault. The irregularity of the dips which I have 

 just described shows also a want of conformity between the sand- 

 stone and the quartzites, which dip regularly away from the Wrekin 

 to the south-east. I am obliged to infer that the Hollybush Sand- 

 stone in this locality is bounded by faults on both sides. 



This sandstone is also found at Lilleshall, five miles to the north- 

 east of the Wrekin, where it constitutes an inlier a mile long by 

 5 mile wide. It is micaceous, thinly laminated, and of a blackish 

 green colour. It is well exposed in the road through the village, 

 dipping evenly to east-30°-south at 30°. On the south-east it is 

 bounded by the Carboniferous Limestone and the Millstone Grit, on 



