44 Reports and Proceedings — Geological Society of London. 



showed it to be so ; and there is a continuity from Lower to Upper 

 Trias, with an unconformity due to the new mode of formation and 

 change in sedimentation. Oscillation and overlapping, which occur in 

 the Trias, are admittedly due to aqueous agency. The Triassic out- 

 crop and the delta area of the River Mississippi are closely similar. 

 The alternations of pebbles and sands, sandstone and marl, etc., are 

 due to those seasonal changes which are characteristic of deltas. 

 Coloration is original, from below upwards, and not coincident with 

 bedding. The thickness of the Bunter is an ai'gument for a subsiding 

 area. The ferruginous types in the Carboniferous, Permian, and Trias 

 are alike due to delta conditions. The Trias is horizontal now, as 

 originally, away from any ancient hills which it covers, and ' radial 

 dip' is merely 'angle of rest'. It is only the skerries, furthermore, 

 that are rippled. Screes, too, occur mainly to the south-west of 

 submerged hills. Sandstones thin out eastward, marls westward, and 

 the skerries are on the hills. The surface features of ancient hills 

 once covered by Trias are quite unaffected ; and desert conditions are 

 merely marginal, limited to granitic or syenitic knolls at one horizon, 

 Avhile in the surrounding areas such conditions are absent. Rock-salt 

 and gypsum are also horizontal and continuous in a linear direction. 

 The TCeuper gradually merges into the Rhsetic phase, and the latter 

 into the Lias. Since the Bunter sediments came from the north-west 

 into the Midlands, so probably did the Upper Trias. Triassic 

 sediments and those of the Nile are similar, but the first have been 

 acted upon chemically, the latter mechanically. Local metamorphic 

 and volcanic rocks may have provided some of the heavier minerals, 

 but as a whole their source was more distant. The flora and fauna can 

 be grouped in provinces around the delta-head of the Trias. These 

 considerations all point to an aqueous mode of sedimentation in a moist 

 and equable climate ; and desert conditions only prevailed locally. 



Decemler 7, 1910.— Professor W. W. Watts, Sc.D., M.Sc, F.R.S., 

 President, in the Chair. 



Dr. A. S. Woodward communicated an account of recent excavations 

 in the cavern of La Cotte, St. Brelade's Bay (Jersey), made during the 

 present year by the Jersey Society of Antiquaries. According to the 

 report of Mr. E. T. Nicolle and Mr. J. Sinel, shortly to be published 

 by the Jersey Society, the cave has yielded evidence of human 

 habitation and traces -of Pleistocene Mammalia. About a hundred 

 flint implements of the Mousterian type have been obtained, besides 

 part of a molar of Rhinoceros antiquitatis and both teeth and antlers 

 of Rangifer tarandus. Human remains and teeth of Bos have also 

 been examined and determined by Dr. C. W. Andrews and Dr. A. S. 

 Woodward, to whom the whole of the collection of mammalian 

 remains was referred. This being the first discovery of typical 

 Pleistocene Mammalia in the Channel Islands, the Jersey Society 

 hopes to proceed with the excavations as soon as possible. 



Dr. A. Strahan, F.R.S., Treas.G.S., delivered a lecture, illustrated 

 by lantern-slides, on the occurrence of recent shelly Boulder-clay and 

 other glacial phenomena in Spitzbergen. 



