56 F. L. Kitchin and J. Pringle — 



Pit and in the exposure near to it where this bed was seen. They 

 have the same pale exteriors, roughened by protruding quartz- 

 grains, and the fractured surfaces of their interior parts show the 

 same dark, compact, hard ground-mass of phosphatic material 

 enclosing rounded quartz-grains and rusty specks. The overlying 

 6 in. bed of claystone-nodules and the 3 ft. bed of sand at the 

 top of the section are developments not seen at Billington Crossing. 

 The series above the false-bedded sands is thus a fuller one at Miletree 

 Farm, but the variation shown is just what might be expected to 

 occur under the conditions which prevailed prior to the deposition 

 of the deeper-water interruplus clay. 



Towards the northern end of the western face in the same pit 

 (No. 8) the whole of the above series of horizontal sandy beds 

 becomes cut off obliquely by a mass of Upper Gaiilt, showing a well- 

 marked basement-bed sloping down towards the north (Fig. 3). 

 The following is the section as examined at an easily accessible 

 spot, indicated by an arrow on the figure : — 



ft. in. 

 Soil with a few subangular flints ... & 



Upper [Lowest clay of Upper Gault, containing small 



Gaiilt Clay. -! white calcareous nodules (up to 1 inch in 



[ diameter) ....... 4 



, Imjjure yellowish -brown earthy sand with some 

 admixture of clay and many rounded quartz- 

 pebbles (up to 2 in. in diameter), and with some 

 white nodules as in clay above ; also brecciated 

 Basal bed fragments of ironstone and smooth rounded 



of hollow pebbles of ironstone ; an undulating 



Ujjper ^ 2 in. limonite ironstone-band (of secondary 



Gault. origin) at base and a similar band at and near 



the top, the two often broken and dislocated, 

 sometimes apjoroaching each other and becoming 

 confluent ; also thin, irregular interlacing 

 branches of tabular ironstone within the bed ; 

 varying from 4 inches to .... 1 4 



its imdulating loiver surface resting unconformably on the 

 tardefurcata bed and underlying sands, as seen 

 in previously described section in the same pit. 



While the original constituents of the basement-bed of the Upper 

 Gault include angular and subangular fragments of limonitic 

 ironstone and many worn hollow pebbles of ironstone, mostly 

 haematitic, the thin tabular limonite-bands are evidently of later 

 introduction. They show dislocation and contortion, due to move- 

 ments in the bed subsequent to their formation. 



When traced towards the north within this pit the Upper Gault 

 eventually cuts across lower and lower strata, until it comes in 

 contact with the current-bedded sands at the bottom of the pit. 

 Where this relation is shown, as in the northern face of the pit, the 

 clay above the basement-bed is present to a thickness of about 

 8 feet, the slope of the ground-surface reducing what would other- 

 wise have been a thicker mass of this clay. The basement-bed and 

 the clay above, which dip towards the east in this face of the pit, are 



