Vol. 62.J PHOSPHATIC CHALKS OF WINTERBOTJRNE AND BOXFORD. 517 



with small and widely-scattered flint-nodules. Fish-remains and a 

 few coprolites occur in the residues. The Chalk contains very few 

 fossils of megascopic dimensions, and proof of its Uintacrinus-Kge, 

 was obtained with difficulty. We could find no exposures of the 

 Chalk (at least 30 feet thick), which comes in between the top of 

 the pit and the base of the Eeading Beds in Hoar (or Hour) Hill, 

 to the south. 



(t) Exposures in the banks of a lane south-east of 

 Boxford Schools. 



About 60 yards north-west of the pit (s), and 10 to 15 feet 

 below the level of its floor, soft white Uintacrinus-Chalk occurs in 

 the road-banks. 



Nearer the Schools, at a lower level by about 30 feet, a very 

 hard chalk, continuous with that seen at the top of the excavation 

 now to be described, is exposed in a like position. 



(u) Quarry 300 yards north-north-east of 

 Boxford Church. 



This is an old excavation of considerable size, but the greater 

 part of its face is buried under bush-grown talus. The following 

 succession can be made out near the northern end (descending 

 order) : — 



Feet 

 4. Soft to very bard, yellowish-white chalk, having a lurnpy or nodular 

 appearance on weathered surfaces, and containing a few flints in the 

 lower part. The softer portions have an indistinctly-conglomeratic 

 or brecciate structure. The harder occur in ill-defined bands 

 parallel to the bedding, and in elongate bodies or pockets, at various 

 angles thereto. Oysters abound in places, and are often so disposed 

 in the mixed, hard and soft, lumpy chalk as to suggest that they 

 grew upon very uneven fissured surfaces. The softer chalk of this 

 bed, or group of beds, is distinctly pbosphatic, the residues being rich 

 in brown polished coprolites, casts of Globigerina and Textidaria 

 and other foraminifera, and a variety of organic debris of doubtful 

 origin. Brown and light-green concretions of angular form (up 

 to a quarter of an inch in diameter) are very abundant in places. 



Fish-remains occur, but are not very prominent about 10 



3. Firm, harsh, irregularly-jointed, and lumpy, white chalk with one 

 distinct band of nodular, and a few seams of tabular, flint near the 

 middle. The residues of this chalk are bulky and often very coarse. 

 Samples from the lower part of the bed are full of Asteroid-ossicles, 

 fragments of Inoceramus, broken Claris-plates, etc. No phosphatic 

 material was noticed. A thin seam of grey rubbly marl occurs at 



the base about 14 



2. Yellow rocky chalk ; minutely banded with iron-stains, and containing 

 green concretions. The top of this hard band is even and clearly 

 defined, and bears in places a very thin brown glaze. From it descend 

 borings filled either with the marl or with soft chalk, the latter 

 containing a small proportion of phosphatized material of the 



usual kinds 1 to 2^ 



1. Soft, white, blocky chalk, passing up into the above rock. It contains 

 one prominent band of large flmt-nodules (about 5 feet down) and 

 many small, scattered, finger-shaped flints. Many of the big flints 

 are studded with Asteroid-ossicles and remains of Cidaris and 

 Inoceramus 7 



