J. E. Marr — Glacial Deposits. 265 



almost horizontally from the upper portion of the Crag ridge, and 

 which brings the deposits below against beds above inclined at 

 quite different angles. The whole arrangement of the drifts at this 

 part of the pit is extremely difficult to comprehend. 



The gravel and sand 2 — Figs. 1 and 2 — are stratified and frequently 

 false-bedded. They contain a considerable intermixture of argilla- 

 ceous material. The boulders are similar to those in the Boulder-clay, 

 mainly chalk and flint. I noticed two small fragments of red 

 chalk. The carbonate of lime has collected along divisional planes, 

 as in the case of the Boulder-clay and of the loam. In the central 

 part of the section the gravel undoubtedly does at present overlie 

 the Boulder-clay, and though it is underneath it at the south end, 

 this seems to be due to the thrusting of a trough of gravel and loam 

 under the Boulder-clay. 



The gravel is arranged around the Crag ridge in two loops, and 

 in the northerly one a mass of sand (Fig. 1, C) is involved ; this 

 sand is almost certainly a piece torn off from the Crag. It is 

 entirely different from the gravels and loams, and resembles 

 precisely the bleached portion of the Crag ridge, being, like it, a 

 pale yellow-green quartzose sand, devoid of lamination; moreover, 

 here and there a few brown patches show parts that have escaped 

 the bleaching, as is also the case with the Crag of the ridge. 



The drift-gravel is in one place coloured red, viz. along a line 

 (Fig. 2) proceeding from the northern edge of the Crag ridge. This 

 is possibly due to subsequent infiltration, but it is also possible that 

 small particles of the Crag have been carried down along this line. 

 The latter certainly seemed to me to be the case on examining the 

 coloured seam closely. 



Immediately below this stained line occurred a fragment of the 

 bed C" (y. Fig. 2) caught up in a small patch of loam in the centre 

 of the gravel. 



The loam 3 — Figs. 1 and 2— is a stiff yellowish-brown clay, 

 sometimes sandy, and containing comparatively few boulders. It is 

 very finely laminated throughout. It occurs in the loop just south 

 of the Crag ridge, and in the centre of the loop now underlying the 

 Boulder-clay in the southern portion of the pit-face. It again occurs 

 in a very narrow loop to the north of the Crag ridge ; this expands 

 above the plane, which is, as I have suggested, possibly a fault 

 jDlane, and is then continued along this plane as a very narrow seam, 

 sometimes only a couple of inches in thickness, above the patch of 

 Boulder-clay before referred to, and beyond it for some yards to the 

 extreme north end of the section. 



In a pit to the east of Mr. Green's, a considerable mass of the 

 ferruginous sands of the Crag is seen, succeeded hy coarse gravels, 

 above which comes contorted loam, in some cases bent into long 

 horizontal loops, but no Boulder-clay is now visible. Here again 

 the Crag sands are absolutely undisturbed, notwithstanding the 

 violent contortion of the drifts immediately above. 



Two important sections occur near the town upon the right bank 

 of the Stour. One of these is near the summit of Balingdon Hill 



