528 PEOCEEDINGS OF THE GEOLOGICAl SOCIETY. 



opposite side of the same basin — namely, from the Upper Zwart Kei, 

 north of the Winterberg, and 60 or 70 miles 8.S.W. of Dordrecht. 

 The sketch map (fig. 10) is to explain how the sides of this range of 

 hUls are worn away, rising from the more level ground to the 

 top of the ridge. In the section the outlines of the Great Win- 

 terberg and the Groot Tafelberg are shown in the distance, to mark 

 the relative positions in which they are seen from this point. 



On the top of this ridge is found at 14, 14, a mass of enor- 

 mous blocks of disintegrated basalt capping its edge. Similar blocks 

 are found at a lower portion of the ridge resting on ISTo. 9. No. 

 13 is a very hard compact sandstone, weathered into vertical 

 lines until it has assumed an almost columnar or basaltic appear- 

 ance ; but on being broken, it displays distinct hues of horizontal 

 stratification. It forms a precipice some 30 feet high along the 

 face of the hills. Below this is a coarse-grained sandstone (No. 11, 

 11), sloping away to the bed of shale (No. 10) immediately under- 

 lying it. This shale is upwards of 200 feet thick, and of a much 

 darker colour than the shales below ; no fossils have yet been found 

 in it. It forms a sloping shoulder all along the hills, as shown on 

 the left of the section; and its position in the map is at 10, 10, 10. It 

 rests upon a coarse-grained sandstone (No. 9), the exact thickness of 

 which is unknown. This covers a sandy shale (15), about eight feet in 

 its thickest part, and gradually thinning out. In this shale (15) Mr. 

 Donald White discovered the fragment of bone D. S. 39*, and the fossil 

 D. S. 40*. Below this is a shale (7, 7, 7), varying in thickness, and 

 about 20 feet where thickest, interlaminated with thin streaks of 

 bluish clay, and near the top discoloured with innumerable specks of 

 carbonized matter. No. 6 is a gritty greyish sandstone (specimen 

 D. S. 45*), about 200 feet thick. This becomes exceedingly coarse- 

 grained in the uppermost beds. In its lower portion were found the 

 reptilian skull (D. S. 35*) and the fragments of bone (D. S. 36 and 

 37*) ; at the spot marked " 5 " the lowest band is quite a plant-bed,^ 

 of which D. S. 38 and D. S. 43 and 44 are specimens *. 



No. 4, beneath this, is a concretionary sandstone (see specimen 

 D. S. 46*), containing fragments of shale and quartz, together with 

 nodules, such as those sentf (Nos. D. S. 29 to D. S. 34). Three 

 beds of similar rock occur in the outlier 6. At one spot, as in 

 stratum 3, it appears as if the shale had been cut through by some 

 stream or current down to the sandstone beneath, and the nodular 

 sandstone (4) deposited in the space thus denuded. If this supposi- 

 tion be correct, the banks of this ancient stream must have been at 



* D. S. 35. Small skull in sandstone, with calcareous cement. 36. Bone in 

 similar sandstone. 37. Bone in concretionary calcareous sandstone. 38. Fine- 

 grained concretionary calcareous sandstone as above, with Calamites (?). 39. 

 Sandstone, with calcareous cement, containing bone. 40. Tooth in calcareous 

 sandstone, as 39 ; the other part of the specimen is greenstone. 43 and 44. 

 Pine-grained sandstone, with highly calcareous cement, and containing Peco- 

 pieris{?). 45. Fine-grained sandstone. 46. Concretionary, fine-grained, cal- 

 careous sandstone, with some films of shale. — T. R. J. 



t Sandy, chatoyant, radiating calcite. — T. E. J. 



