Vol. 62.] HIGHEST SILURIAN" ROCKS OP THE LUDLOW DISTRICT. 211 



to the south, and 200 yards west of the bridge strike so as to cross 

 the river. 



On the southern bank, the Downton-Castle Sandstones are seen 

 just behind the Forge, and up the banks of a small stream which flows 

 northward into the river at this locality ; but the best section is seen 

 in a large quarry at the top of the southern cliff, where a path runs 

 along in the Tin-Mill Wood, at a height of 45 feet above the river. 



Here 22 feet of sandstones are exposed, dipping southward at 7°. 

 The lowest beds seen are the massive sandstones (E c), but their 

 base is not visible; they are succeeded by the carbonaceous sandstones 

 (E d), which are in turn overlain by the thinly-bedded micaceous 

 sandstones (E e). About 7 feet from their upper limit a coarse 

 micaceous bed seems to represent the Fish-Bed, but the fish-remains 

 are not so abundant as at some other localities. The sandstones 

 above it gradually acquire a greenish tint, and a more mealy texture, 

 and pass gradually up into the rubbly shales (E a) so characteristic 

 of the highest division of these rocks. (Cf. vertical section, fig. 6, 

 p. 212.) This is one of the best sections in the district for showing 

 the junction between the Downton-Castle Sandstones and the 

 Temeside Shales. 



Continuing north-east through the Tin-Mill Wood, and following 

 the lower track where the path divides, one may again see the higher 

 members of the Downton-Castle Sandstones (E e) in several small 

 quarries. The strike of the beds sweeps round gradually in a 

 northerly direction, until beyond the old Tin-Mill the beds dip north- 

 east at 8°. 



In the low cliff which forms the right bank of the Millrace an 

 excellent section of Temeside Shales is exposed, passing up into the 

 Old Red Sandstone (cf vertical section, fig. 7, p. 213). The bed of the 

 Millrace is occupied by soft grey flaggy beds (Fa), but these can only 

 be observed in dry weather, and are usually covered by water ; the 

 higher beds of the rubbly shales are seen at the side. A red shale- 

 band is conspicuous near the base of the low cliff, and about 2 feet 

 above it a gritty bed with broken Lingulce is found: this is easily 

 recognizable, and seems to be a local bone-bed ; it has yielded 

 Lingula cornea, Onchus tenuistriatus, Ctenacanthus-like spines, and 

 Leperditia cf. marginata. 



The hard grey sandstone (F b) forms a well-defined ledge all along 

 the section, and is succeeded by a grey shale-bed, from the weathered 

 surface of which large specimens of Lingula cornea often project in 

 great abundance. These pass up into the more typical olive shales 

 with the Temeside Bone-Bed (F d). In its general characters, this 

 bone-bed is exactly comparable with that exposed on the River Teme 

 at Ludlow. It is very fossiliferous at this locality, and has yielded 

 the following forms : — 



Ptcrygotus ludensis. 

 Ptcrygotus problematicus. 

 Onchus tenuistriatus. 

 Onchus Murchisoni. 

 Onchus sp. 



Lingula cornea. 

 Ctenacanthus sp. (?) 

 Cephalaspis sp. (?) 

 Pachythcca sphcerica. 



