281 
Devon and Cornwall, Belgium, the Eifel, Sfc, 
raised to their present level ; a speculation into which I do 
not think it necessary to enter, the established fact of the 
difference of position and association, and consequently of 
date as to origin, being sufficient for my present purpose. 
Other matter is to be found scattered through Mr. Holds- 
worth’s observations, which comes very well in corroboration 
of the general view which I have given of the structure and 
composition of that district in my memoir on the south of 
Ireland ; although Mr. Holdsworth nowhere draws the dis- 
tinction himself between the transition conglomerate and sand- 
stone, and the overlying conglomerate and sandstone of the 
Monavoullagh range, further than by considering the former 
as a conformable, and the latter as an imconformable forma- 
tion, On the contrary, he gives it as his opinion that all the 
conglomerates and sandstones which he has noticed in the 
eastern part of Waterford are identical, excepting perhaps 
those occurring on the north-west of the city of Waterford 
and those around Dunmore on the western side of Waterford 
harbour, which he conceives may be of more recent forma- 
tion, but no reason is assigned for this opinion. The identity 
spoken of, however, seems mainly to refer to the similarity 
of mineral composition, respecting which there can be no 
difference of opinion. 
But to return to Mr. Griffith. It is clear from the pre- 
ceding that he has confounded together the old red sandstone 
formation, properly so called, with the red conglomerate, 
sandstone, and slate, which occasionally occur as constituent 
beds in a transition country. 
The horizontal position of the Monavoullagh sandstone 
conglomerate is quite in accordance with what is observable 
in the detached portions of the same formation which are 
studded over the northern border of the clayslate table-land, 
overlooking from the south the valley of the Suire, and where 
in the year 18 14, when first exploring that country, I found 
the sandstone conglomerate reposing uncon formably on the 
truncated edges of the subjacent clayslate. Mr. Holdsworth 
appears to have made a similar observation in a quarry ad- 
jacent to the road between Kilmacthomas and Portlaw, where 
the junction of the clayslate and the conglomerate is very dis- 
tinctly marked, the slate there being thrown up nearly per- 
pendicular*. 
Indeed, when we consider the long-drawn range of the 
Monavoullagh from north to south, being nearly at right 
angles with the eastern and western strike of the bordering 
older stratified rocks, both on its eastern and western con- 
* Journal of Geol. Soc. of Dublin, vol. i., part 2, p. 95. 
