SUCCESSION IN THE TRENT BASIN. 461 



Notts and Leicestershire. Here the Chalky Clay may be seen in 

 its intensely chalky condition, and also as a silty clay with striated 

 boulders and beds of sand. 



Good sections were exposed in the cuttings on the railway be- 

 tween iN'ottingham and Melton Mowbray. Mr. J. J. Harris Teall 

 has kindly allowed me to make use of some notes he made when 

 the work was in progress. To these notes I have been able to add 

 some by Mr. Shipman. 



Resting upon deposits of rather uncertain age, which have been 

 described as Middle Pennine Boulder-clay, there occurs, at the 

 mouth of the Stanton tunnel, a deposit of unstratified Boulder-clay 

 with chalk and flint, thickening to 70 feet in the centre of the 

 tunnel, wbere it rests upon a splendidly striated floor of Lias lime- 

 stone, indicating an ice-flow from east-north-east to west-south-west. 

 At the south-south-east end the tunnel was entirely in this deposit. 

 Similar clay formed the uppermost member in the Plumtree cutting. 

 This deposit is evidently the Great Chalky Boulder-clay, the ice of 

 which age first passed over and striated the Liassic floor and then 

 heaped upon it 70 feet of morainic Boulder-clay. South of the 

 Stanton tunnel the rock-fragments in the clay become much more 

 varied in character, and show an arrangement from north-west to 

 south-east, similar in order to that of the outcrop of the rocks from 

 which they have been derived. Eor example, in the north-westerly 

 cuttings Keuper marl, E-haetic shale, and Lias rocks abound ; but as 

 we work south. Middle Lias, Oolitic limestone, and Cretaceous rocks 

 appear in increasing profusion, an arrangement evidently due to the 

 ice advancing roughly along the strike of the rocks. Still nearer 

 Melton Mowbray, at Grimston, Chalky Clay rests upon bluish silt and 

 Melton Sand. Similar deposits are exposed in the railway-cuttings 

 near Asfordby. These sections have been described under the 

 Melton Sand. 



Xear Mount Sorrel the Chalky Clay rests upon a mamillated rocky 

 surface. In many cases the rocks beneath Boulder-clays, especially 

 the softer kinds, are broken and forced out of position instead of 

 being smoothed or striated. 



At Leicester Abbey morainic Boulder-clay rests upon Middle 

 Pennine Boulder-clay, from which it is separated by a sharp line of 

 division. 



At Oadby and other places in the neighbourhood, the Chalky 

 Clay has been forcibly driven over the Melton Sand, contorting or 

 ploughing up large masses of it. The action of the ice-sheet has here 

 been to crumple the sand into folds trending roughly from north 

 to south, and indicating an ice-flow from the east. 



At Mr. Beasley's sand-pit to the south of Aylestone, the upper- 

 most member is a blue clay with flints, &c. ; it has been forced over 

 the underlying Middle Pennine Boulder-clay and Quartzose Sand 

 with which it has been incorporated. 



Around Market Bosworth the Chalky Clay is exposed at several 

 points and presents much the same appearance as at Abbots Brom- 

 ley. At Shenton, near the railway, a brick-yard exposes about 



