416 On the ROCKS in the 
tal, and extremely well defined ; but immediately over it, im the 
erecnftone, the appearance of the flip is not continued. Some 
indications of a flip appear a little to the right of it. 
Ina part of the Greenftone which is confiderably decompo- 
fed, a vein, ftretching horizontally, of a dark-green fibrous 
fubftance occurs, (No. 10.); it is foft, and has a fhining fatiny 
luftre, like afbeftus. I have not anywhere in this vicinity met 
with any fimilar fubftance. 
WE now proceed to Salifbury Craig, where the circumftances 
I fhall principally notice, are, 
1. The texture of the greenftone rock, with the foffils it con- 
tains. 
2. The vein of greenftone by which the Craig is interfected. 
3. The included mafs of fandftone which occurs in the green- 
{tone ; 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; the point of contact being marked by a {mall 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 ina 
vertical line, from the edge towards the centre, where the {tone 
is always moft perfedtly 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. 
