Vol. 57.] IGNEOUS ROCKS OF THE TORTWORTH INLIER. 



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Farm. rrom this we obtained Coelospira liemispli(jerica^ Sow. ; 

 Chonetes striatella^ Dalm. ; lihi/ncJionella nucula. Sow. ; and Phacops 

 Weaveri, Salt. Mr. Reed comments upon the presence of the rare 

 and apparently local trilobite Phacops Weaveri, here and near 

 Damery. This form seems, so far, to have been recorded only from 

 this district. 



Fig. 2. — SletcTi-section illnstraiive of iJie reappearance of the 

 trap-hand in Miclde Wood. 



S.W. 



a b c?= Plateau of Mickle Wood, 

 c— Old quarry in trap, 

 e/— Trap- band with Upper Llan- 

 dovery Beds above and below. 



^ = Road by stream (Little Avon). 

 i = Slope of valley where trap- 

 blocks are abundant. 



Between the point where the trap-band emerges from Mickle 

 Wood and the pond at the cross-roads east of W^oodford Farm, there 

 are only uncertain indications of the course of the igneous rocks. 

 Here, however, the trap is well exposed all round the pond, along 

 the road towards Damery, and along that towards Woodford Farm. 

 The rock is strongly araygdaloidal, and shows on the Damery road 

 weathered bands with numerous minute pieces of shale. Close to 

 the pond, on its north-eastern side, are two lenticular masses of 

 baked shale, one about 10 feet long, caught up in the trap. This 

 is the most intrusive-looking portion of the trap that we have seen ; 

 and, close by, the sedimentary beds seem to be striking towards the 

 trap. Unquestionably the igneous rock here occupies a larger area 

 than anywhere else in the district. This broadening of the trap is 

 probably due here, as at Daniel's W'^ood, to the occurrence of an 

 anticline. In any case the course of the trap curves round at this 

 point, which forms the northerly limit of the synclinal basin, and 

 the rock is again well exposed in a disused quarry near Middle Mill 

 to the south-west. 



This quarry is well worthy of a visit from those who are interested 

 in igneous rocks, and is in many respects more instructive than the 

 better-known exposure at Damery. There is a thick mass of amyg- 

 daloidal trap coursing into the hill towards the pond before mentioned. 

 The upper and lower parts are comparatively compact, and have 

 been extensively quarried. The middle portion, which has been left 

 outstanding by the quarrymen owing to its irregular character and 



