426 On the ROCKS in the 



No. 50. is another fpecimen of the fame kind; the greenftonc 

 is here of the ufual colour, and the line of junction molt admi- 

 rably defined. This was taken from the great quarry. The 

 next, (Nc. 51.), is a fpecimen of the fandflone in its fuppofed 

 unaltered flate. Nos. 49, and 50. are both from the lower 

 junction. No. 52. is from the upper edge, taken about half- 

 way between the higher!: part of the Craig and Holyroodhoufe. 

 Here the fandflone prefents a facetted appearance, an arrange- 

 ment which may be owing to the fuperabundance of calcareous 

 matter. 



No. $3. is highly indurated, of a deep red colour, with a 

 conchoidal fracture, and a facetted texture. 



No. 54. has the fame facetted appearance. 



No. 55., extremely clofe-grained, is from one of the contor- 

 tions north of the dike. 



Nos. 56,8c 57. Thefe are the varieties of the fandflone which 

 have been called jasper. This is an improper name, as it con- 

 founds two fubflances totally different. The mofl compact con- 

 tains a large proportion of lime, and in afpect is very fimilar to 

 fome of the limeflones of Gibraltar. 



Nos. 58, to 61. are varieties of the fandflone, found near the 

 greenflone. 



No. 62. Although this fpecimen was taken very near the 

 greenflone, flill it does not exhibit the ufual induration. This 

 exception occurs in different places on Salifbury Craig ; and it 

 even fometimes happens, that the ftone next the whin is lefs in- 

 durated than the one below it. 



No. 63. Containing a large proportion of ferruginous mat- 

 ter. 



No. 64, to 66. Different fhades and varieties of the fandflone, 

 in an indurated flate. 



No. 



