410 
EXCURSIONS. 
a search was made for fossils, with a view to determining, if 
possible, the exact horizon of the beds, but owing to the extensive 
decalcification which had taken place, such remains as were 
found could not be identified with certainty. 
In the upper part of this quarry several beds of chert with 
quartz pebbles occur, the joints in the rock passing indiscrimin- 
ately through both the matrix and the pebbles. The dip of the 
beds was found to be about 20"^ to the south. 
The limestone quarries at Craig Nant were next examined, 
and although fossils were not numerous, a sufficient number 
was found to justify the placing of tlie beds in the upper part 
of the zone D2. 
The limestones were found to be much more massive than 
those in the quarry described above, blue in colour, and to 
have suffered much less alteration. 
They lie immediately below the cherty beds mentioned 
above. 
In a second quarry, also at Craig Nant, a bed of shale was 
seen to underlie the massive limestone, but was separated from 
it by a series of thin bedded limestones. 
The following fossils were obtained from the Craig Nant 
sections : — 
Diphyphyllum. 
Lithostrotion irregulare. 
Lonsdalia floriformis. 
Cydophyllum. 
Dihunophyllum. 
Syringopora sp. 
Productus sp. 
Many of the bedding planes showed deposits of tufa similar 
to that which occurs in the knoll-reefs in the neighbourhood of 
Clitheroe in Lancashire, and in those of Yorkshire and the Isle 
of Man. 
The presence of Lonsdalia floriformis marks these beds as 
belonging to the zone of D2. 
The limestones are covered by a layer of glacial drift of 
varying thickness, containing many boulders of local rocks, 
together with some northern erratics, wliich include the granite 
