Vol. 62, .] PHOSPHATIC CHALKS OF WINTEEBOT/ENE AND BOXFOED. 519 



presence of Chalk no younger than that of the Uintacrinus-'Ba.ndL at(s), 

 a third of a mile distant in that direction, and some 40 feet higher, 

 above sea-level. Unless there is a fault or sharp syncline between 

 the two places, the beds must become horizontal, or nearly so, 

 immediately to the south- south-east of the quarry. The fact that 

 hard chalk, similar to, and, in part, clearly continuous with, that at 

 the top of this working (u), is traceable in the rubbly soil southward 

 to the lane by the School (t), favours the idea of a rapid flattening 

 of the dip south-south-eastwards. There is evidence that the 

 inclination of the beds decreases more slowly in the opposite direc- 

 tion. [See note on the pit (w), below.] We strongly suspect that 

 it is a strikeward extension of this flexure which brings in the 

 ' belemnoid-beds ; on the south side of Rowhedge, at (j). 



North-east of this quarry (u), hard chalk forms a marked bluff 

 which follows the east side of Hangman-stone Lane to a little 

 beyond the sharp bend near the figures '310' (see map, fig. 1, 

 p. 500), and a belt of hard rubble extends from this bluff, east-north- 

 eastwards, along the hedge towards the spread of similar debris, 

 with Actinocamax granulalus, descending from near (j) and (k). 



(v) Exposures about a third of a mile north-north-east 

 of Boxford Church. 



The arable land on the end of the rather acute and steep-sided 

 spur in the angle between the Lambourn and Hangman-stone 

 Lane valleys is thickly strewn with lumps of chalk and stout 

 flint-nodules, evidently derived from the rock below. Samples of 

 the solid chalk extracted on the lower and middle slopes of the 

 spur, north-west of the angle in the road near the quarry (u), 

 were found to be rich in phosphatized organisms : the bulky wash- 

 residues containing an abundance of pale-brown casts of foramini- 

 fera, with the usual coprolites, fish-remains, and small concretions. 

 Most of the unphosphatized material is comminuted Inoceramus- 

 shell. Megascopic fragments of Micraster and Inoceramus are very 

 common, and the greater part of two tests of M. cor-anguinum were 

 found in the rubble on the surface. 



The chalk on and below the surface at the top of the spur 

 contains (at the points where samples were taken) a very small 

 proportion of phosphatic granules, and is evidently very flinty. 



The high south-south-eastward dip noted in the quarry (u) about 

 1 furlong to the south, as also the absence of the hard beds there 

 found, leads us to infer that the Phosphatic Chalk on the middle 

 and lower slope at the end of this spur is older than any hitherto 

 dealt with in this paper. Its thickness is unknown, since the dip 

 could not be ascertained. Its position with reference to the next 

 pit (w), and the characters of the associated Micrasters, enable us to 

 assign it to the upper half of the Micraster cor-anguinum-Zone. 



