[ 297 ] 

 XLIL Proceedings of Learned Societies. 



GEOLOGICAL SOCIETY. 

 [Continued from p. 223.] 

 February 21, 1883.— J. W. Hulke, Esq., F.R.S., President, 

 in the Chair. 

 H^HE following communications were read : — 

 -*- 1. " On the Relation of the so-called 'Northampton Sand' of 

 North Oxfordshire to the Clypeus-Grit." By Edwin A. Walford, 

 Esq., E.G.S. 



The objects of the paper were said to be twofold : — in the first 

 place to show the existence of some hitherto unrecognized beds of 

 the Inferior Oolite in North Oxfordshire, and then to endeavour to 

 define their position by comparison with one of the uppermost of 

 the Cotteswold subdivisions, the Clypeus-grit. The area under 

 discussion was said to be for the most part embraced in quarter 

 sheet 45 N.W. of the Geological Survey, in the N.E. corner of 

 which is situate the town of Banbury, whilst to the extreme S.W. 

 lies Chipping Norton. The author first called attention to some 

 remnants of a series of oolitic limestones at Coombe Hill, near 

 Deddington, which he considered to be the equivalent of the Oolite 

 Marl. He then pointed out near Bourton-on-the- Water the inter- 

 vention of some sandy limestones and carbonaceous clays between 

 the Clypeus-grit and the Euller's Earth ; he thought they might 

 possibly represent beds found above the Clypeus-grit near Chipping 

 Norton. The beds marked in the map 5' g 7', hitherto termed 

 Northampton Sand, he said were well shown in the new railway- 

 cutting at Hook Norton, and were capable of being split into 

 several divisions : — the two thin base-beds containing Ammonites 

 Iceviusculus and corals ; the next higher (series C) yielding a large 

 fauna, amongst which were RhyncJionella spinosa, Trigonia signata, 

 and a doubtful fragment of Ammonites ParJcinsoni. These, with a 

 higher series of sandy, marly, and siliceous limestones, designated 

 D and E, were proved to extend over the high lands to the S.W. 

 It was shown that at one end of a ridge called Otley Hill the beds 

 C rested on the Upper Lias, whilst on the S.W. flanks of the ridge 

 the Clypeus-grit was to be seen also resting upon the Upper Lias. 

 A road-section near Over Norton, he said, showed beds similar in 

 lithological character to C and D of Hook Norton, resting upon the 

 Clypeus-grit and evidencing a fauna of a somewhat similar cha- 

 racter. The author thought that the almost unfossiliferous series 

 E, which had been called the Chipping-Norton Limestone, might 

 probably be found to be the equivalent in time of part of the 

 Euller's Earth, or of some of those beds of the Inferior Bathonian 

 of the Cote d'Or described by M. Jules Martin. 



2. " Results of Observations in 1882 on the Positions of 

 Boulders relatively to the Underlying and Surrounding Ground, in 

 North Wales and North-west Yorkshire; with Remarks on the 

 Evidence they furnish of the Recency of the Close of the Glacial 

 Period." By D. Mackintosh, Esq., E.G.S. 



The author began by showing how boulders may be regarded as 



