Mr. Horner on the Mineralogy of the Malvern "Hills, 297 



calcareous particles which this does not. It is evidently produced 

 from the disintegration of other rocks, probably those of the chain, 

 and has every appearance of being of very late formation. 



§ 30. On the north-east side of the Worcestershire Beacon, and 

 in the road leading from Great Malvern to St. Ann's Well, I found a 

 rock of a loose coarse-grained texture, with an earthy fracture, com- 

 posed of mica and hornblende in a state of decomposition, mixed 

 with red felspar. It has a slaty structure, which in some places is 

 more distinct than in others from there being a greater proportion 

 of mica, and its disposition is, within a short space, sometimes 

 vertical, sometimes inclined at a considerable angle, and dipping 

 to different points of the compass ; having the appearance of large 

 masses irregularly heaped together. This rock is traversed by a 

 vein of sulphate of barytes about four inches in thickness, and which 

 occasionally includes detached portions of the rock through which 

 it passes. The particular spot where I saw this rock, was where 

 an excavation had been made in the hill round a house newly built, 

 and as the rock was cut down to a considerable depth, a good section 

 of it was exposed to view. 



§ 31. The western side of the Worcestershire Beacon is covered 

 with turf, so that whatever rocks occur there, are completely 

 concealed. 



§ 32. Between the Worcestershire Beacon and the chasm called 

 the Wych, the rocks, on the eastern side, are similar to those I have 

 already mentioned, except in one instance on the top of the hill, 

 where a rock is found composed of greenish-brown mica, intermixed 

 with hornblende. Although mica is the chief ingredient, this rock 

 has not the slaty structure which most micaceous rocks have, but 

 the laminse which are pretty large, are irregularly grouped together, 

 and cross each other in all directions. It is an insulated mass of 



2 p 



