Page:Transactions of the Geological Society, 1st series, vol. 3.djvu/374

 limestone, but to be interposed between two vertical masses. The barytes contains copper pyrites and green oxide of copper, and in the limestone near the vein I found quartz crystals scattered through the mass, giving it an appearance like a porphyry. I also observed in some places traces of carbonate of copper in the limestone.

§ 32. In going over the top of the hill (which is very much covered by vegetation) the ends of the strata appear above the grass in many places in a vertical position, and running between north-east and south-west, but on coming to the quarries where the rock is extensively exposed, I found that although it is evidently stratified, it is so shattered and so crossed by rents in every direction, that it was impossible for me to discover what were the true planes of stratification, the internal structure of the stone affording no indication. Judging however from the more general direction of the masses, I think they may be said to be either for the most part vertical, or at least very highly inclined and running between north and south. I did not discover the least appearance of slate or any circumstance that could connect this limestone with the subordinate beds in the grauwacke series of the neighbouring hills, except its proximity to them. It more nearly resembles the Plymouth limestone than any other I am acquainted with, and although that has been found to contain both madrepores and shells, there are great portions of it where no traces of organized bodies can be discovered. It is also very probable that by a more minute examination they may be found in the limestone of Cannington Park, for it has certainly very much the appearance of what is called a transition limestone, and there are laminæ of calcareous spar dispersed through it, which are strong indications of organic remains. It produces a very pure white lime, which is carried to a great distance.

§ 33. From the termination of the marsh land which lies to