168 PEOF. T. T. GROOM ON THE GEOLOGICAL [May 1 899, 



Llandover}'' Beds when traced towards the Malvern range itself 

 (that is, towards the east), for near the southern end of Chase End 

 Hill, and near Castle Coppice, close to Midsummer Hill, the Llan- 

 dovery Beds rest on zones of the shale as high as, or higher in the 

 series than, the shales beneath the escarpment near Bronsil. 



The current statement that the Llandovery Beds transgress across 

 all the Cambrian zones into the Archaean must, therefore, in my 

 opinion, be modified. 



It is proposed to supplement the present communication by 

 further papers dealing with other portions of the Malvern and 

 Abberley ranges, and with the stratigraphy, palaeontology, and 

 lithology of t]]e rocks considered. 



EXPLANATION OF PLATES XIII-XV. 



Plate XIIL 



Geological Map of the Southern Part of the Malvern Hills, on the scale of 

 4 inches to the mile. 



Plate XIY. 



View of Baggedstone Hill from the south. 



The observer is supposed to be standing on a spur of Chase End Hill (at 

 the spot marked 269 in the map). The village of White-leaved Oak is per- 

 ceived near the middle of the view, situated partly on an igneous band 

 which forms the series of gentle swellings running south and north-west 

 of the houses seen. The western edge of this ridge is seen to the left of 

 the haystack, and in the distance is marked by a large tree at the northern 

 corner of Pendock's Grove. The eastern limit of the Black Shales is marked 

 approximately by the trees at the top of the field on the western slope of 

 Eaggedstone Hill. The HoUybush Sandstone forms most of this slope, 

 the upper limit being indicated approximately by the top of the sharp 

 ridge above the village, and by the trees farther north-west. The depres- 

 sion marking the axial thrust-plane is well seen beyond this line, passing 

 between the two summits of the hill. 



Plate XV. 



Yiew of the Holiybush Pass and Midsummer Hill, from the hollow known as 

 Winter Combe, on the northern slope of Raggedstone Hill. The axial 

 depression forming this hollow is continued beyond the pass to the left of 

 the quarry (schists) between Holiybush Hill on the right and Midsummer 

 Hill on the left. The observer is standing on the small quartzite-ridge, 

 the chief rock-exposure of which occurs by a small holiybush seen in the 

 bracken. To the left of the houses, near the centre of the view, is seen 

 the bank in which the May Hill Sandstones are faulted against the Archgean 

 diorite. 



Discussion. 



Dr. Hicks said that the faulted conditions at the margins of the 

 crystalline rocks in the Malvern Hills agreed in a marked manner 

 with those along the borders of the pre-Cambrian crystalline rocks 

 at St. David's and in other areas in Wales. Before Holl showed 

 that these rocks in the Malvern Hills were of pre-Cambrian age, 

 they were supposed to be metamorphosed Cambrian sediments. 

 Similar rocks in Wales were stated to be either metamorphosed 



