41 6 On the ROCKS in the 



tal, and extremely well defined > but immediately over it, in the 

 greenftone, the appearance of the flip is not continued. Some 

 indications of a flip appear a little to the right of it. 



In a part of the Greenftone which is considerably decompo- 

 fed, a vein, ftretching horizontally, of a dark-green fibrous 

 fubftance occurs, (No. 10.); it is foft, and has a fhimng fatiny 

 luflre, like afbeftus. I have not anywhere in this vicinity met 

 with any fimilar fubftance. 



We now proceed to Salisbury Craig, where the circumftances 

 I friall principally notice, are, 



i. The texture of the greenftone rock, with the fo fills it con- 

 tains. 



2. The vein of greenftone by which the Craig is interfered. 



3. The included mafs of fandftone which occurs in the green- 



ftone p and, 



4. The indurations and interruptions of the ftrata. 



No. 11. is a fpecimen of the greenftone taken from the lower 

 edge of the bed, at the great quarry, where it touches the fand- 

 ftone j the point of contact being marked by a fmall remaining 

 fragment of the latter, at which the grain of the ftone is much 

 finer than at the other extremity. The colour is iron-grey, 

 with fmall fpecks of calcareous matter interfperfed. 



Nos. 12, 13, & 14. are different gradations of texture, taken in a 

 vertical line, from the edge towards the centre, where the ftone 

 is always moft perfectly cryftallifed ; from hence it again de- 

 clines in grain towards the upper furface, where we find it in 

 the fame earthy and uncryftallifed ftate (No. 15.) obferved at 

 the bottom. In the laft fpecimen, there is a fmall detached 



fragment 



\ 



