32 PROF. T. G. BONNET ON THE NABBOBOUGH DISTBICT. [Feb. 1895, 



crest of the hill. The clay presently attained to a thickness of about 

 16 feet, being covered by from 3 to 4 feet of soil (brownish in colour 

 and more or less clayey). Its presence was doubtful on the western 

 side of the pit, where the surface of the rock is higher. On the 

 eastern it continued for some time resting on the syenite, until, as 

 this rock gradually fell southward, Keuper Marl set in between the 

 two. Possibly the Keuper rose very slightly in that direction ; at any 

 rate it came to the surface at that end of the pit. Hereabouts, 

 owing to a rapid drop in the syenite — at an angle of 25° or 30° — ■ 

 the Marl must be full 50 feet thick. In the pit at Enderby the 

 Boulder Clay rested against a rather irregular slope of syenite, 

 which rose from beneath it and came to the surface on the upper 

 part of the hill : the greatest thickness seen was about 24 feet. In 

 the pit near JSTarborough the syenite did not anywhere reach the 

 surface, but it came nearest to it (within about a couple of yards) 

 at the E.N.E. corner. In most parts it was covered by some 20 to 

 24 feet of newer rocks (often about 10 feet of Keuper Marl and the 

 same of Boulder Clay). The latter seemed to occupy a slight hollow 

 in the Keuper, in which a distinct grey band about 3 feet thick was 

 useful in marking an horizon. Here, as elsewhere, the banding in 

 the Keuper drops gently away from the higher parts of the buried 

 crystalline rock, and sometimes is slightly affected by its irregu- 

 larities. Boulders of the latter are not infrequent at the base of 

 the former. They are not, however, very numerous, and I never 

 saw, so far as I remember, any noteworthy quantity of breccia. 



(6) The surface of the syenite in pits near Stanton Fields Wind- 

 mill showed some signs of ice-action, but these consisted, as commonly 

 in the Forest, 1 only in the smoothing away of the crests of project- 

 ing ridges or craglets, so as to produce a surface a few inches wide. 

 In one case I thought I could discern some slight striatum. 2 But I 

 saw between Sapcote and Stony Stanton a newly bared triangular 

 surface of syenite (base about 30 yards, altitude about 12 yards) which 

 was quite rough ; so too was the rock exposed, as already described, 

 in the new pit near the road to Huncote. 3 Beneath the Boulder 

 Clay at Enderby, Croft Hill, and Narborougb, the surface of the 

 syenite, so far as I could see, varied from a gently undulating to a 

 moderately rough slope, and afforded no distinct indication of ice- 

 action, 4 certainly nothing approaching a roclie moutonnee. At ]N"ar- 

 borough the grey band in the Keuper under the Boulder Clay seemed 

 a very little wrinkled at one place, but generally the surface of the 

 former either shelved gently below or ran almost level with the latter, 

 and no signs of ploughing up or contortion were perceptible. 



(c) The matrix of the Boulder Clay was generally of a bluish- 



1 Quart. Journ. Geol. Soc. vol. xlvii. (1891) p. 96. There is much informa- 

 tion on the glaciation, etc., of the Forest region in Mr. W. J. Harrison's 

 ' Geology of Leicestershire,' pp. 43-47. 



2 But in regard to striation here, see Quart. Journ. Geol. Soc. vol. xxxiv. 

 (1878) p. 230. 



3 Both these had been covered only by surface-soil. 



4 Attention was paid to this point in 1894 as well as on former occasions, 

 and I feel no doubt as to the correctness of the statement. 



