402 JOHNS : FAULTS IN THE SETTLE- MALH AM AREA. 
The much faulted ground between the Stockdale fault 
and the Millstone Grit boundary to the south is closely 
related structurally to the area beyond, and can best be 
discussed in connection with it. 
The suggestion of Dr. Marr that the outer Craven fault 
(middle of his paper) runs along the Beacon and Attermire 
Scars is now confirmed. 
The age of the E. and W. and the N.W. or X.N.W. fault systems 
and their relation to the important E. and W. antic lines, can 
only be profitably discussed when the facts relating to the east- 
ward and westward extension of the faults can be reviewed. 
For the same reason, no attempt has been made in this paper 
to discuss the differences of opinion that exist as to the corre- 
lation of the rocks north and south of the Craven Faults. 
In concluding, an acknowledgment should be made of the 
generous assistance which the writer has received. The work 
done in this particular area was based on, and only possible 
through, the results of an investigation of the Carboniferous 
rocks north of the faults. During that investigation much 
assistance has been received from many officers and members 
of the Yorkshire Geological Society and the Geological Section 
of the Yorkshire Naturalists' Union, among whom special mention 
should be made of Mr. H. Culpin, of Doncaster, and Mr. W. 
Robinson, of Sedbergh. Dr. Wheelton Hind has not only placed 
his detailed knowledge of N.W. Yorkshire at the writer's dis- 
posal, but has visited the district many times during the pro- 
gress of the work, besides determining many of the fossils. Dr. 
Arthur Vaughan not only undertook the onerous work of deter- 
mining all the corals and most of the brachiopods, but has been 
unwearying in discussing the many difficulties that have arisen 
from time to time. For the conclusions recorded in this paper 
the writer is solely responsible. 
