Yol. 55.] CONGLOMERATES OF THE LOWEE SEVERN EASIN. 105 



extremity of the area, 4 miles distant, there is only 25 feet of actual 

 breccia that can be paralleled with the breccia at Compton and the 

 Sheepwalks, Enville, and the materials are more rounded than in 

 the south. 



At Compton and the Sheepwalks, as we pass up through the 

 225 feet from the base to the summit, the fragments for the first 

 50 feet increase gradually in size, but at 150 feet above the base 

 become smaller again, while more marly material is intermixed with 

 the layers of breccia-fragments, until at last the rock-fragments 

 practically disappear and we find ourselves in the overlying zone 

 classified as W. At Gilbert's Cross the upper portion of D^ is typically 

 shown : here the breccia is intermixed with much marl, and definite 

 layers of consolidated sandstone occur, containing some small 

 breccia-fragments (not exceeding as a rule 2 inches in length), 

 which I term breccia-sandstone. At Gatacre, near the north- 

 western extremity of the area, the lower zone D^ is still a typical 

 breccia (25 feet) containing subangular fragments rarely exceeding 

 6 inches in length, but this is overlain by a mass of marls and of 

 breccia-sandstone (35 feet thick). The breccia is exposed at Gatacre 

 Castle, and the breccia-sandstone in a lane by Gatacre Park Parm 

 and on the road from Six Ashes to Bobbington : some of it is slightly 

 calcareous. 



The derived sandstone-blocks (Llandovery sandstone, etc.), so 

 commonly found in the Sheepwalks breccia in the south, are 

 extremely rare at Gatacre in the north. These Llandovery sand- 

 stones can be identified from point to point by their fossils, and are 

 the most prevalent of the more destructible fragments found in the 

 trappoid breccias north of the Abberley and Lickey Hills. 



J)\ regarded as a whole, is a marly series, but it contains one 

 definite and nearly continuous breccia-band, which to the south- 

 south-east is about 50 feet thick, and occurs near the middle of the 

 division. It forms a very prominent ridge, extending for 2| miles 

 from Enville to Bobbington. The maximum thickness of J)^, from the 

 point where it rests upon the trappoid breccia to the north-eastern 

 boundary, where it is overlain by the Lower Bunter, is about 150 feet. 



In the south-east, near Enville, where they are seen best, the 

 lower marls, forming part of D^, are about 50 feet thick. Farther 

 north-west they are exposed at Bobbington Hall, about a mile from 

 the north-western boundary of the Permian, where they cover a 

 wide expanse of ground, owing more or less to the gentle dip, and 

 .are seen to contain some intercalated beds of fine breccia. These 

 intercalated breccias seem wholly to disappear north-north-west of 

 Bobbington Hall. 



The middle and most persistent breccia-band of W is more con- 

 tinuous in the southern portion of the area. The rock-fragments here 

 are abundant, and sometimes attain a length of 6 inches. They 

 gradually decrease in size and abundance, and, when followed in a 

 north-westerly direction to Bobbington, they have become so small 

 and infrequent, while the amount of sandy and marly material is so 



