4 ©EOLOGT. 



tern of folds ; and if any fault is to be feared in making the Channel 

 Tunnel, it must be one at right angles to these. A. J. J-B. 



Barrois, Charles. L'Age des Couches de Blackdown (Devonshire). 

 Ann. Soc. Oeol. Nord, t. iii. pp. 1-8. 



Describes the U. Greensand of the Isle of Wight and Dorsetshire, 

 corrects statements on the subject given in a previous paper [see above], 

 and believes that the higher part of the U. Greensand of the Isle of 

 Wight represents the Warminster Beds ; the lower part represents the 

 Blackdown Beds, These divisions are constant, and can be followed 

 throughout the south of England. Lists of fossils are given. W. T. 



Le Tunnel de la Manche. [The Channel Tunnel.] Rev. Sci. 



2 ser. 4 ann. pp. 1070-1072, 1192, 1193. 



Gives the succession of Cretaceous strata in the Hampshire Basin, 

 and describes the various anticlinals and flexures which traverse the 

 S.E. of England and the N. of France. Correlates the axes of elevation 

 as follows : — Kingsclere and Artois, Winchester and Bresle, Isles of 

 Wight and Purbeek and the Pays deBray. The Weald contains many 

 lines of upheaval ; that of Wadhurst is correlated with the lines of 

 Winchester and Bresle. Eeference is made to the transverse lines of 

 disturbance. The chief object of the paper is to prove that the Strait 

 of Dover has no connexion with the axis of the Isle of Wight, as had 

 been maintained by a writer in the * Revue ' (nos. 39 & 47). W. T. 



Baisett, A. On " the Diamond-drill." Proc. S. Wales Inst. Eng. 



vol. ix. pt. ii. no. 1, p. 130, plates 15-19. 

 The plates give sections at Risoa. [The same as the paper noticed 

 in the Geological Recokd for 1874, p. 3.] 



Birds, J. A. Post-Pliocene Formations ^of the Isle of Man. Geol. 

 Mag. dec. 2, vol. ii. pp. 80-85. 



Authors have hitherto regarded the Boulder Clay of the Isle of Man 

 as of one age. Mr. Birds' examination of the district has led him to 

 the conclusion that the Upper Boulder Clay of the mountains has been 

 confounded with the Lower Boulder Clay of the coast cHffs, and that 

 therefore a threefold division of the Drift exists, as follows :^A. Newer 

 Glacial Formations. Upper Boulder day, with angular or slightly 

 rolled stones, almost exclusively of local origin, and occasional inter- 

 calations of sand and gravel ; generally occupying higher ground than 

 the next deposit, and supposed to have been mainly formed by floating 

 ice about the period of the second submergence. — B. Older Glacial 

 Formations. 1. Stratified Sands and Gravels, containing an abundance 

 of well-rolled, far-derived stones, and thought to have been deposited 

 from far-travelled floating ice during the period of the great submer- 

 gence ; seen to a thickness of 15 feet. 2. Lower Boulder Clay — brown 

 clay, with beds of sand and gravel, containing not many stones, and 

 only a few of far-derived materials ; seen to a thickness of 100 to 150 

 feer, and supposed to have been ground up beneath land-ice, and de- 

 posited in the- sea during the period of the first depression. The paper 

 is illustrated by diagrams, and contains a list of works relating to the 

 Geology of the Isle of Man. J. G. G. 



