90 MR. E. W. BiNNEY ON A DOLJiRITE 



kind as to send me some specimens of rocks from Glea- 

 ston which puzzled her a good deal. Some of the parties 

 to whom she had sent them called them dolomites, whilst 

 others named them traps and greenstones. To the latter 

 opinion Miss Hodgson, I believe, was inclined to add the 

 weight of her sanction. Not having previously seen, or 

 even heard of, the occurrence of any such rocks in the 

 district where they were said to be met with, I went over 

 to examine them, and, having been furnished with infor- 

 mation by Miss Hodgson, easily found the place where 

 they are exposed at Gleaston Green. At that time Mr. 

 Jopling^s book had not been seen by me. The space oc- 

 cupied by these singular rocks, at least so far as at present 

 exposed, is so limited that all that can be seen is very soon 

 ascertained. Specimens were collected, and a few obser- 

 vations made. The former, by the kindness of my friend 

 Professor Roscoe, F.R.S., were analyzed for me in the 

 laboratory of Owens College. It is only by the labours of 

 the chemist that geologists can with any certainty decide 

 upon the age and origin of such rocks as those which are 

 met with at Gleaston. 



On approaching Gleaston Green from Scales, the moun- 

 tain-limestone appears to occupy the country so far as it 

 can be seen. In a quarry below the old castle on the 

 roadside, this rock in the northern part is very hard, and 

 dips to the west at an angle of 25°, whilst in the southern 

 part, where it is softer, it dips in the same direction at an 

 angle of 16°. Owing to the covering of drift, the lime- 

 stone is not seen nearer to the mill ; but it probably extends 

 further in that direction. At a short distance below the 

 mill, dark-coloured laminated shales are seen in the bank 

 on the roadside, dipping apparently at an angle to the 

 N.N.W. We then come to the rocks at the end of the 

 Green. They appear to run in an east and west direction, 

 and are not now exposed for more than twenty yards. 



