382 
THE CRETACEOUS ROCKS OF BRITAIN. 
is worked in two levels ; the highest part of the upper face as seen in 
1896 was as follows : — 
feet. 
Soil and rubble --------- 1 
Blocky, softish white chalk with a few flints - 6 
Layer of flints.- Oj 
A course of hard lumps showing the structure of sponges 
in iron stains.1 
Soft white chalk.4 
A layer of grey marl - .Oj 
White soft chalk with a very few scattered flint nodules - 6 
The section is here complicated by a fault and talus slope, but 
at a slightly lower level the continuing face showed 45 feet of soft 
white chalk with a few flints in its upper part. In the lower work¬ 
ings of this quarry about 65 feet of massively-bedded white chalk 
without flints is seen containing Terebratulina gracilis var. lata and 
Inoceramus Cuvieri ; a well-marked layer of marl occurs 17 feet 
above the floor of the pit. The total depth must be over 140 feet. 
The Deptling quarry has a vertical face of about 100 feet. The 
upper part of this was inaccessible at the time of our visit (1896), 
but a few flints could be seen for 30 feet below the summit of the 
quarry. The remaining 70 feet was in massively-bedded, soft 
white chalk with Spondylus spinosus, while Galerites subrotundus 
and Rhynchonella Cuvieri were obtained from the quarrvmen. 
A quarry near Harp Farm, three-quarters of a mile north of 
Boxley, and another by the lower Bell Inn expose the upper part 
of the same zone with its usual characters. 
The Melbourn Rock, with from 20 to 30 feet of the overlying 
chalk, is exposed in most of the quarries in the valley of the Med¬ 
way. The section in the lower quarry of the Burham Brick Com¬ 
pany has already been given (see p. 49); the base of the Terebra¬ 
tulina zone is probably just below the floor of the upper quarry, 
which continues the section through that zone and through the 
chalk with Holaster planus. The section will be given inVol. III. 
The section seen in Messrs. Peter’s quarry at Wouldham has been 
given on a previous page (p. 49), and we need only remark that the 
Melbourn Rock, here about 12 J feet thick, is very well shown, 
covered only bv 8 or 10 feet of firm whitish chalk. 
The topmost beds of the Middle Chalk containing some scat¬ 
tered flints and three or four horizons along which flints occur in 
line at intervals, can be seen in the large quarry known as Bores 
Hole, south-west of Chatham, but the height which can be 
actually examined depends upon the quarrying operations, for 
the face exposed is sometimes vertical and inaccessible. 
Passing westward to Wrotham two large quarries will be found 
on the slope of the hill N.N.E. of the village, and these form an 
almost continuous section, the lower one being entirely in the soft, 
massively-bedded, white chalk of the Terebratulina zone, while the 
other continues the section upward into the Upper Chalk. 
