published respecting Antrim, Deny, &c. 269 



quoted by Mr. D. p. 86), and by himself, Appen. p. 81, as 

 before observed ; or rather, they over-lie the great Basalt, 

 and under-lie the IVhinsto?ie, as both of the authors, first 

 above quoted, call this small or upper Basalt, although 

 Mr. D. rather obscures this interpretation, in pace 86, by 

 saying, that the Whinstone is " the same (kind of?) stone 

 as the Basalt of Fair-Head, and is imperfectly columnar:" 

 we are no where however told, what space 10 the south- 

 ward this Whinstone occupies, before the Slate com- 

 mences? and whether other Coal- measures do not come 

 on upon this Whinstone ? (as I think very probable); or 

 how or in what form- the Whinstone or its covering strata 

 adjoin to (whether by underlieing or overlieihg) the Slate 

 S of them?; on all which points Dr. R. is raJier sur- 

 prisingly silent, and does not. any where, I believe, mention, 

 or allude to the Granite* found S of the Coal-field, on 

 Ballypatrick Mountain, mentioned by Mr. D. p. 84, and 

 on the Mountain above Cushenden (perhaps the same ?) 

 accompanied by Gneiss (p. 9^2 and 93), where " the enor- 

 mous fractured mass of this substance, which hangs over 

 the Road on the left, and the disjointed frasmenls that lie 

 under it on the right, as the hill is descended, caimoi fail 

 of striking the beholder with awe;" at the bottom of page 

 93, Mr. D. is more particular in describing the places of 

 the Limestone, Granite, Gneiss, and red coarse Sandstone 

 (or Puddingitone), to the Traveller. Dr. R. in describing 

 the edge of the basalt on the Limestone, in this part, App, ' 

 p. 21 and 43, mentions only the Slate, and by directing 

 the devious steps of his Tourist (App. p. 95), up the 

 soulliern Road from Ballycastle (instead of that SE) shows 

 him this Schiitus only : and in so doing (like Dr. Townsend, 

 as I suspect) loads the Cosmogonists with unnecessary dif- 

 ficulties, respecting the unconformableness of the Slate and 

 Coal-measures, as already mentioned. 



I shall now take the hberty of suggesting (in hopes of 

 early correction through your means, wherever I am wrong) 

 what appears to me to be the structure of the north-eastern 

 part of Ireland, from the facts disclosed in the very interest- 

 ing accounts which 1 have been reading, and the know- 

 ledge I have of similar or analogous phaenomena in very 

 distant situations. 



First then, I suppose that the lowest known Stratum or 

 assemblage oi' strata in this district is a very thick Red 



* At Cushlealc N of Newtownglens, Gneiss, mica Slate, and Granite are 

 four,('. and occupy tlie Coast, I'.ccording to Dr. D Prerace xiii: mid "dark- 

 blue piiinary or transition Limestone," at Tor -point, p. xiv. 



S 3 Marl, 



