140 
THE CRETACEOUS ROCKS OF BRITAIN. 
These three beds in Branscombe cliffs were identified by Mr. 
Meyer with his Nos. 10,11, and 12. Westward the Bed A1 thickens 
again in a few yards to a depth of 6 feet, A2 being at the same spot 
only 9 inches, and B only 5 inches thick. Here the base of Bed A1 
is piped into the cracks and rifts of the underlying rock, and spaces 
of some size are filled with it. 
In the next bluff, about 130 yards to the west, A1 is absent alto¬ 
gether, A2 has a thickness of 2 feet 9 inches, and there are traces 
of B above it. 
A quarter of a mile further west, below Berry cliff and above 
Bed Bock path, is a fallen block in which these beds are conveniently 
exposed for examination. The lower bed here (A2) is a hard gritty 
and shelly limestone, with a clear basal plane of separation ; but B 
is represented only by 4 or 5 inches of rough gritty stone welded 
on to the lower bed, and full of brown phosphatised lumps. 
Fig. 34. —Sketch of a Bluff in Branscombe Cliffs, Devon Coast. 
5. Middle Chalk with yellowish 
gritty limestone at the 
base. 
4. Rough gritty limestone, (b.) 
3. Rough shelly limestone (a2). 
3. Coarse calcareous grit (a1). 
1. Massive calcareous sandstone 
(Selbornian). 
Where next seen in the cliffs above Donkey Linhay rocks the bed 
B seems to have thinned out entirely, and there is no trace of the 
rough grit (Al), the sole representative of the Cenomanian being 
the hard compact shelly limestone (A2), glauconitic and quartz- 
iferous, thickness 2J feet. Many fossils can be seen in this, but it 
is almost impossible to extract them. I saw here three specimens 
of Pecten asper quite close to the top, and I never found this species 
in the higher bed B. 
