Vol. 59.] DISTURBANCES IN THE CHALK NEAR ROFSTON. 367 



(3) Lime-kiln, south-west of NewselPs Park and 

 north of Barkway. 



Here we find from 20 to 30 feet of Chalk exposed in a large 

 pit, about 440 feet above sea-level. It is difficult to see any 

 orderly arrangement in the Chalk. There is, towards the southern 

 end, an irregular undulating band of scattered flints, and an 

 occasional gall of brown clay may be noticed near the base of the 

 pit. Near the base also, and about midway, is an irregular 

 mass of brown earthy and chalky material — shattered Chalk with 

 earthy matrix. A grey clayey streak beyond extends in a curved 

 direction from the top to the bottom of the pit. This might have 

 been taken as an indication of dip, but it is probably a shear-plane, 

 as the character of the Chalk differs along what otherwise would be 

 the bedding-planes, and thus indicates displacement. There appears 

 to be a portion of a flint-band in the northern part of the pit. 



All doubt about the nature of the disturbance was removed by 

 the fact that below an overhanging portion of the Chalk, in the 



Fig. 6. — Section at the lime-kiln, south-west of JYetuselVs Park 

 and north of Barkway. 

 S. c . N. 



le *^Q^k 



Boulder- Clav Scattered flints Brown earth Chalk Chalk 



t,o r y in chalk withchalk without flints without flints 



[Scales, vertical & horizontal : 1 inch — about 32 feet.] 



southern part of the pit, there is an exposure of 4 feet of brown and 

 greyish-brown Boulder-Clay, — similar in character to that elsewhere 

 noted, a mass of which also occurs in this pit on the north-eastern 

 face. In the Boulder-Clay beneath the Chalk glaciated pieces of 

 chalk occur, and two phosphatic nodules from the Cambridge Green- 

 sand were found. 



From this pit the illustration (fig. 2, p. 8) in the Geological-Survey 

 Memoir was taken. It shows a regular succession of curved beds of 

 Chalk, and, as observed by Messrs. Penning & Whitaker (op. cit. p. 7) : 



' The clip increases to about 60°, being well shown by four distinct layers 

 (hard beds, marl, and flints).' 



The following is their record of the section (op. cit. p. 8) : — 



' a. Whitish Boulder-Clay ; occurs in a hollow at south-west corner. 

 b. Upper Chalk, with scattered flints. 

 e. Chalk-Rock. Hard cream-coloured crystalline chalk, irregular beds, 



2 to '2\ feet thick. The chalk between with a thin layer of marl and a 



broken- up layer of flint-nodules. 

 d. Lower Chalk (Inoceramus, ticalpellum, etc.). 



