and Chalk at Goodland Cliff and Torr Eskert. 



181 



are frequently rough and saw-like ; and that the projections are filled by sy- 

 enite, continuous with the mass ; and the indentations in the veins with mica 

 slate, having a tortuous structure. 



On tracing these veins as they gradually ascend the cliff to the south-east, 

 their true nature is at once discernible. There, they may be seen pursuing 

 undulating courses, neither parallel to each other nor to the laminse of the mica 

 slate; in some places approaching to within four feet, but in others, being 

 more than twenty feet apart. (See cut. No. 2.) 



About 150 yards to the south of the point, where the veins meet the sur- 



120 feet, the cliff is fractured by a great fault, or downthrow of the strata to 

 the north ; and by means of which the cliff is accessible. To the south of the 

 fault, the veins are at about 100 feet higher level than to the north, and it is 

 remarkable that to the south of this point three veins are observable, instead 

 of two, by the introduction of a small vein, which, when first observed, is in 

 contact with the upper surface of the lower vein, but gradually diverging 

 from it, approaches the upper vein, and afterwards descends a second time 

 towards the lower vein. The accompanying sectional view. No. 3, was taken 

 a short distance to the south of the fault. At this place the upper vein is about 

 five feet thick; the middle is fourteen inches, and the lower about seven feet; 

 and the distance between the upper and lower veins is fourteen feet, including 

 the middle vein. 



No. 3. 



Syenite veins (e) traversing mica slate (a) in Goodland Cliff, south of Murlough 



