75 
a note on the carbonifekous sequence in the neighbour- 
hood of pateley bridge. 
by arthur vaughan, b.a., d.sc, f.g.s. 
Introduction. 
During the visit of the Yorkshire Geological Society to 
Pateley Bridge, in April of the present year (1906), I had the 
welcome opportunity of examining the Carboniferous Sequence 
in that district. Although the material which I then obtained 
has not yet been completely examined, I deem it good policy 
to set forth, here and now, a general summary of the facts which 
the visit has established, as well as of the facts upon which 
further light is required, in the hope that more much-needed 
material may be forthcoming. I therefore appeal to the numerous 
and keen workers of the Yorkshire Geological Society to under- 
take the elucidation of those more difficult problems which 
can only be solved by continuous and exhaustive field work. 
A flying visit to a new district raises an easy crop of suggestions, 
but the credit of final truth can only be gained by the worker 
who has examined every exposure throughout the area. 
The Carboniferous Sequence. 
I. — The Limestone. 
The lowest horizon which was examined, in the immedie^te 
neighbourhood of Pateley Bridge, consists of massive fossiliferous 
limestones. These beds are excellently exposed in the quarries 
on Greenliow Hill, and contain a rich fauna of Corals and 
Brachiopods. 
The horizon of these limestones is unquestionable ; the 
included fauna indicates with certainty the upper part of the 
Dibunophyllum-Zone (DJ of the Avonian Sequence. 
The following fossils (selected from a much longer list) are 
of common occurrence in the Greenhow Quarries, and constitute 
an assemblage, which, in the South Western Province, is 
absolutely distinctive of D^. In fact, the fauna is practically 
