288 Reports & Proceedings—Geologists’ Association. * 
river they bend round to an H.S.H. course, which is maintained for 
75 miles, and probably is their main direction. Wherever the 
upward pitching of the axes brings the limestone members up above 
the general level of the land, the denudation has developed out these 
limestone arches as conspicuous anticlinal hills. Thus the main 
anticlines are seen as chains of more or less continuous limestone hills, 
exceeding 1,000 feet in height. 
The principal surface showings of oil arise from the Camp Creek 
Series. In the well oil was found throughout these beds and also 
in the Fort Creek Shales, in which measures the present large flow 
of oil has been encountered. The oil is of high quality, having 
specific gravity “845 and containing 22°5 per cent of petrol. In 
view of the thickness and extent of the petroliferous formations, 
the favourable structural conditions, and the copious showings of 
oil, it is thought that a great oilfield region has been discovered, 
GEOLOGISTS’ ASSOCIATION. 
Friday, 6th May, 1921. 
“The Geological History of the Pewsey Vale.” By W. D. 
Varney, B.Sc. 
General description of the Geology and surface features of the 
country surrounding the Pewsey Vale. Folding of the Pewsey 
Anticline, in Cretaceous, Miocene, and Phocene times—description 
of the drainage system so initiated. Plateau Gravels near Bradford 
Gorge of Bristol Avon—evidence of a river flowing eastwards. 
Relationship of such a river to the Pewsey Vale and the present 
Salisbury Avon. Reversal of the drainage by the River Severn, and 
the development of the Bristol Avon. Drainage still being modified 
by the Bristol Avon at the western end of the Pewsey Vale, 
illustrating how the Bradford Gorge was formed. Comparison with 
the Kennet and other rivers. The last stages in the shaping of the 
Pewsey Vale, down to recent times. Recession of the Chalk Escarp- 
ment in Wiltshire. Maps showing changes in drainage since Pliocene 
times. 
“On a Superficial Deposit at St. Andrew's, Guernsey.” (1) A 
description of the Section. By B. G, Chilcott, F.G.S., and L. 
Richardson, F.R.S.E., F.G.8. (2) Petrology of samples of Brick- 
earth, etc., from the locality. By P. G. H. Boswell, 6.B.E., D.Sc., 
F.G.S. 
Epitor’s Nore.—Owing to the large number of important 
original papers now on hand, it has been found impossible to spare 
even one page for Hditorial Notes. For the same reason the number 
of pages allotted to reviews and reports is somewhat smaller than 
usual. 
