76 Mr. Bryce on the Geological Structure of 



mately disappear and the rock becomes a fine marl. Thus the conglomerate, 

 with its enormous, imbedded masses, graduates so imperceptibly into a fine 

 red sandstone, that it is altogether impossible to separate them in nature. 



The strata of the conglomerate on the shore, have an inclination conform- 

 able to the old red sandstone on which they repose; but near Red Bay castle, 

 where the conglomerate graduates into red marl, its strata gradually pass from 

 their usually inclined to a horizontal position, which the red marl afterwards 

 preserves. 



The strata of the conglomerate are also horizontal along the front and north 

 side of Lurgeidan mountain ; and they are never found inclined in the in- 

 terior. 



The conglomerate does not extend further south than the opening of Glen- 

 arifF-glen. It rises to a considerable height on the eastern front of Lurgeidan 

 Mountain, and stretches in a narrow zone around its northern base to the 

 head of Ballyeemin-glen ; but the whole stratum soon after thins entirely out 

 in the eastern face of Teavemuile, in the upper part of Corlane. Its pre- 

 vailing character in the first part of its course is that of a siliceo-argillaceous 

 base of a reddish grey colour, including numerous round and angular frag- 

 ments of various sizes of quartz and mica slate, with smaller of red granite. 

 Here also it rests in nearly horizontal strata upon the edges of the highly 

 inclined beds of mica slate and old red sandstone, and when near the mica 

 slate its base is often very micaceous. 



(15.) The red marl occupies the bottom and sides of GlenarilF to a con- 

 siderable height ; and its uppermost strata, next the mulatto or green sand, 

 are highly argillaceous, but never contain gypsum. That substance does not 

 appear until after turning the point of Garron, where it is found in the ar- 

 gillaceous marl, subordinate to the sandstone. White and blue clay-galls 

 also, are not unfrequent in the red sandstone of Glenariff. Prom Glenariff 

 the red marl ranges round the front of Lurgeidan Mountain, overlying the 

 conglomerate, but in a narrower zone, and turning westward along its 

 northern side, runs out in the townland of Cuilags, a considerable distance 

 east of the termination of the conglomerate. The same gradation between 

 these two deposits, which I have described in Red Bay, is everywhere ob- 

 servable. In MuUach-fin-ooar, between Ardsillach and Torr, a patch of red 

 conglomerate is interposed between tiie mica slate and the chalk; it includes 

 loosely imbedded fragments of mica slate and quartz, and is very like the 

 conglomerate of the caves in Red Bay. It extends along the south-east face 

 of the hill fronting the sea. 



(16.) The red sandstone and its conglomerate are fully developed in Mur- 



