Remarks on-the Transition Rocks of Werner. 19 
I may now notice the extent of country occupied by 
rocks of this description ; but such is our limited acquaint 
ance even with our own island, that it can be done only in 
an imperfect manner. We know too little of the north of 
Scotland, to be able to say what rocks occur beyond the 
Moray Frith; but it is by no means improbable, that when 
‘these regions have been more fully examined, the transition 
series will be found among them. Indeed I have learnt 
from Dr. Macculloch, that it occurs in great abundance in 
the north. 
Tam inclined to consider that it occupies a large propor= 
tion of Forfarshire ; and if I be correct in an observation 
made on the banks of Loch Katrine several years ago, the 
transition rocks extend in that direction. IT have likewise 
found traces of them on the right bank of the Clyde, near 
Dalnotter Hill in Dunbartonshire. But the transition 
country we are best acquainted with is that of the south of 
Scotland, which stretches entirely across the island. | 
On the one side, it begins near the boundary between 
East Lothian and Berwickshire, and continues along the 
coast to a little beyond the river Tweed. Extending a 
line from the first, to a point on the west coast, between. 
Girvan and Ballantrae ; and from the second, another which 
shall pass by Langholm, to a point between Annan and 
Carlisle, we shall find nearly the whole of the intermediate 
space to be transition, excepting where granite comes in, 
and some partial deposites of later strata, which occupy 
the lower parts of the valleys of Nith, Annan, &c. 
The mountainous district of Cumberland, Westmore- 
Jand, and the north of Lancashire, which is divided from 
the transition of the south of Scotland only by a small pro- 
portion of parallel strata*, belongs to the same, at least 
we know o£ none other with which it can be classed, al- 
though it contains a variety of rocks which cannot be re- 
ferred to any in the series of Werner. 
Adjoining to this, in the western part of Yorkshire, the 
same rocks occur: it is on these that the limestone of In- 
gleborough and Whernside rests. To this succeeds the 
extensive district of parallel strata, including the coal-fields 
of Warrington and Wigan, and the great alluvial de- 
posite of Cheshire. These bring us to the neighbourhood 
of the Welch mountains, which I believe are all of the 
* This term has been applied to distinguish the sandstone strata, and in 
‘that sense 1 now use it: it is objectionable, however ; for all stratified rocks 
Present the phenomena of parallelism ; consequently, without qualification, — 
this term affords no distinction, 
Be same 
