774 E. HILL AND T. G. BONNEY ON TIIK 



shows above the breccia, and coarser slate below. The section there- 

 fore, unless faulted, seems to be — (1) fine indurated slate at the cross 

 roads, (2) coarse grit, (3) ashy slate (in spinney), (4) another fine 

 indurated slate seen at the south end (missing at the north, unless 

 corresponding with that higher up the hill by the lane), (5) the 

 great breccia-bed, (6) slates, and (7) the rocks which we proceed to 

 describe. A few yards beyond the crest, in the line of the section, is 

 a singular band of very dark purple slate with a little white grit, and 

 a few cavities left by decomposed crystals; below it is a breccia 

 with fragments of a similar slate, and of the usual mottled pinkish 

 and greenish felsite-like rock. About 200 yards further is a group 

 of rocks, dip and bedding undistinguishable ; a breccia whose frag- 

 ments are mainly of the dark purple porphyritic rock mentioned 

 above. About 200 or 300 yards further in the same direction, but 

 a little to the right of the line of the section, by a wall in the line 

 of the drainage from a small reservoir, is a mass of agglomerate, or 

 possibly conglomerate ; for the fragments are highly rounded, of all 

 sizes up to that of a man's head. The matrix is a green ashy grit 

 with a few shining felspar crystals scattered about it. But the 

 included fragments compose the greatest part of the rock, and they 

 appear to be entirely of the above-named slightly mottled pink and 

 green felstone-like rock, rather resembling that of Birchwood Planta- 

 tion. 



Crossing the next field and going again 200 or 300 yards to the 

 N.E. beyond a wall, where a private road crosses a low ridge, is a 

 remarkable agglomerate. The matrix is dark green, fibrous, and 

 not very coarse ; the included fragments are a similar rock to the 

 last, a mottled pinkish and greenish subcrystalline rock. This 

 agglomerate is remarkable for the size and abundance of its included 

 fragments, many of which are not less than 15 or 18 inches in dia- 

 meter. They are heaped confusedly together, and make up the 

 major part of the rock. Divisional planes, which look like bedding, 

 are numerous, but shift their direction from point to point in con- 

 tradictory ways ; and the matrix weathers out in lines suggestive of 

 false bedding. The weathered fragments stand out in unusually 

 bold relief. The ridge of rocks extends some distance, showing 

 everywhere these wonderful masses Of volcanic agglomerate, the 

 ruined fragments in all probability of some long-vanished cone. 



Some distance further we reach the last ridge of the High-Towers 

 moorland, where the last letters of the words Hanging Stones are 

 engraved on the map. Here the rocks are a large coarse ash show- 

 ing a considerable mass of breccia, whose fragments are mainly of 

 purple porphyritic rock. A line of cliffs runs in a south-easterly direc- 

 tion through woods surrounding a house, apparently a continuation 

 of these, which were only cursorily examined during a search for a 

 base to this series. They seemed of the same general character. 



The line of this section continued leads us to Charley church. 

 Round this are a few rocks visible at different points. Those nearest 

 it on its west side arc a greyish pink ashy grit, weathering dull red, 

 with some peculiar cavities here and there, due to the decomposition 



