Conglomerates, and Marls of Devonshire. 
19 
but it contains bands of ferruginous matter, locally termed 
- Pan."* 
With the exception of two thin beds of sandy marl — ono im- 
mediately, but not persistently, succeeding this strange accumula- 
tion of pebbles, and the other being somewhat higher in the series 
— the overlying beds are fine-grained red sandstones, which extend 
to the village of Budleigh Salterton. The second of these super- 
jacent strata, upwards of seventy feet above the " pebble bed," con- 
tains, at considerable intervals, a very small number of the true 
quartzite pebbles, but no trace of them has been detected else- 
where. The irruption, therefore, of this vast horde of rock-frag- 
ments was sudden, unheralded, and unrepeated. 
On comparing this bed with the so-called Conglomerates which 
extend from Exmouth southwards, several prominent points of 
difference present themselves. 1st. — Whilst in the older beds a 
large proportion of the materials are angular or, at most, subangu- 
lar, in the newer accumulation they are all well-rounded and 
polished. 2nd. — Whilst the fragments forming the lower strata 
were derived from parent beds in almost immediate proximity, no 
part of Devonshire could have furnished those which make up the 
*• pebble bed." 3rd. — A north-easterly transportation, such as is, 
on the whole, indicated by the phenomena of the more ancient 
strata, fails to account for either the positive or the negative facts 
of the more modern bed. A current or other agent moving from the 
south-west could neither supply the fragments of quartzite, nor 
fail to bring Devonian and Carboniferous detritus. 4th. — Whilst 
the accumulation south of the Exe is made up of comparatively 
thin, well-defined, easily-separable, and distinctly stratified beds, 
that north of it is one thick and undivided heap of ill-arranged 
fragments. 
It is obvious that results so very dissimilar must be regarded 
as consequences and proofs of unlike conditions, which, acting 
* See Transactions of the Plymouth Institution, 1862-63, page 8, &e. 
