372 



PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [June 4, 



Fig. 2. — Section across the River-valley at Leicester. 

 Length about 5 miles. 



N. 



ts a 



p:; 



a 





i>'3 



7. Gravels and clays, with bones, boulders, &c. 



6. Lias. 



5. Upper marls "| 



4. Upper sandstone-shales 



3. Middle sandstone (" soft beds").. J Upper Keuper. 



2. Lower sandstone-shales 



1 . Red clay 



i 



[Note. In this section the Marls No. 5 are not represented suffi- 

 ciently thick, whilst Nos. 4 & 6 are proportionally too thick.] 



Combining the data afforded by sections south and north of the 

 river-valley, the following table will show the position and extent of 

 the Upper Keuper beds, from the base of the Lias to the Red Clay 

 in descending order : — 



Lias. 







a. 



Upper Keuper marls, containing beds of gypsum and 

 several thin bands of green marly sandstone, on which 

 are found numerous pseudomorphic salt-crystals ; 

 thickness from 80 to 120 feet. 

 ^ ^ b. Thin sandy shales, with way-boards of green marl ; 

 25 to 30 feet. 



c. Thick soft beds of white sandstone, 20 to 30 feet. 



d. Thin sandy shales, similar to 5 ; 35 feet. 

 Total about 200 feet. 



Red clay. 



It is considered that on the north and north-west side of the river- 

 valley, the whole of the beds « & 5 (5 & 4 of the Section, fig. 2), 

 and part of c, have been denuded, and a large accumulation of drift- 

 clay, gravel, and alluvium deposited on the thick soft beds (and pro- 

 bably, where that is entirely denuded, on the lower shales, d) to the 

 thickness in some places of from 60 to 80 feet. 



Most of the fossils contained in the following list were collected 

 from the well-boring in the town, excepting one very fine detached 

 tooth, which was found in the thick beds at the railway -cutting. 



