360 A. R. Horwood—Upper Trias, Leicestershire.. 
the Neogene Mediterranean basin, we find ourselves in the presence 
of great difficulties, arising from the extreme variation in the character 
of the fauna and of the lithological composition of the littoral 
deposits. We have, therefore, to content ourselves by adopting in 
very broad lines the divisions of Lower, Middle, and Upper Neogene, 
corresponding to the three Mediterranean stages of Suess, or accepting 
the terms Burdigalian, Vindobonian, and Plaisancian of French authors, 
attention, however, ‘being Galled to the fact that the last term 
includes the Plaisancian and Astian of the older authors. This being 
established, we can give the following species as characteristic fossils 
of each of these divisions i in Egypt. 
I am indebted to Dr. W. F. Hume, F.G.S., Director of the 
Geological Survey of Egypt, for ay translating this paper into 
English. 
VI.—Tue Upper Trias or LEICESTERSHIRE. 
By A. R. Horwoop.? 
(Continued from May, 1918, p. 215.) 
(WITH A MAP AND PLATES.) 
Part II (continued). 
Physiography. 
Tectonics and River Development. 
Petrography and Lithology. 
Paleontology. 
Economics and Water Supply. 
Sections and Correlations. 
Bibliography. 
Appendix. 
Pe 
4, PHyYSIOGRAPHY. 
STUDY of the local stratigraphy, tectonics, petrography, and 
paleontology leads to some conclusions as to the physiography 
of the epoch in this district. Even studied as a detached area it may 
be noticed that the Bunter or pebble deposits are west of the sandstones 
and marls. From the fact that the eastern limits of the first two are 
west of the marls, and the second (sandstones) west of the pebbles, 
and from the evidence of other areas, it appears that this purely local 
west to east succession is applicable to the whole British area, and 
itis well known that each member thins from north-west to south-east 
(as a whole), This is the sequence typical of aqueous deposits, and 
particularly of delta deposits, and at the same time indicates (in part) 
the direction from which the sediment came. 
Remarks have already been made as to the eastern limits of the 
Bunter and the Lower Keuper. Borings under later Mesozoic and 
Neozoic rocks (chiefly in search of coal)* show that the limit of the 
Red Marl is decidedly further east than that of the Bunter or Lower 
1 Aided by a grant from the Government Grant Committee of the Royal 
Society. 
2 See Harrison, Ussher, MeKenny Hughes, and Royal Coal Commission 
Reports, ete. 
