154 W. D. Lang—The Selbornian of Charmouth, 
LV. The Eastern Gault Section. 
On the eastern side of the bluff another section is seen in the Gault, 
which passes upwards into Foxmould. At the base occurs bluish-black 
loam with Gault fossils, and a little digging through the talus below 
exposes a junction with glauconitic loamy sand. These are obviously 
the two beds exposed in the western section. The blue loam becomes 
sandier on being traced upwards, and the fossils become scarcer, except 
that many Serpula concava, Sowerby, occur in the higher part. About 
7 feet from the bottom of the section (see Fig. 2) an impersistent band 
of hardened loam containing S. concava, Sowerby, is found; above 
which the beds become quite sandy, with blue or grey argillaceous 
veins, for about 4 feet, and then pass into typical Foxmould sand. 
In the right-hand half of Fig. 2 the two sections are represented 
combined in a diagram. The respective tops and bases of the two 
sections are marked on the right-hand margin. 
The fossils recognised {rom the blue loam besides S. concava, Sowerby, 
were Lnoceramus concentricus, Parkinson, Lima gaultina, Woods,! Pecten 
(Syneyclonema) orbicularis, Sowerby, Pinna Robinaldina, d’Orbigny,? 
Grammatoceras | Arca | carinatus (Sow.), Pholadomya sp., and Corbula sp: 
V. Comparison with the Corresponding Beds on Black Ven and on 
Golden Cap. (Figs. 2 and 3.) 
On the left-hand side of Fig. 2 is a diagram of the Gault beds on 
Black Ven, combining the two sections described in the GronoercaL 
Magazine for 1904.* Beds 2 and 3 of that section exactly correspond 
with the two lowest beds exposed on Stonebarrow, and since the fossil 
contents at the base of the higher beds are the same in each ease it 
follows that they are on the same stratigraphical horizon. Now on 
Golden Cap, which les two miles to the east of Stonebarrow (Black 
Ven is a mile and a third to the west of that cliff), the only account of 
the Gault is that by Jukes-Browne in the Survey Memoir.* In the 
section here described the same bed is distinguishable, consisting of 
dark loam with Gault fossils at the base, resting on a glauconitic sand. 
There is thus a stratigraphical datum-line on all three cliffs from which 
attempts at correlation of all the beds can be started. 
On Black Ven, at about 25 feet above the Gault fossils, appears the 
lowest layer of Cowstones. And this has been taken as the base of 
the zone of Schluenbachia rostrata. But on Stonebarrow no Cowstones 
have been recorded. The landward cliff above the sections described 
is a steep slope of Foxmould sands capped by broken remains of the 
Chert-beds and of higher Cretaceous horizons. Here and there a 
section is shown, but the whole surface is much disturbed by fallen 
material and innumerable rabbit-burrows. Were Cowstones present 
they should not be hard to find, for owing to their hardness they stand 
out imminent from the section on Black Ven, and lie fallen in numbers 
in the boggy land beneath. 
1 Hitherto recorded from the Gault of this district as Lima parailela. See Woods, 
‘“ Cretaceous Lamellibranchs,’’ vol. ii (1904), pp. 81 and 32: Mon. Pal. Soe. 
? Hitherto recorded from the Gault of this district as Pinna tetragona or P. sub- 
tetragona. See Woods, loc. cit., 1906, p. 98. 
3 W. D. Lang, loc. cit.: Gron. Mac., 1904, pp. 125 and 130. 
* A. J. Jukes- Browne, ‘‘ Gault and Upper Greensand of England,”’ 1900, pp. 184 
and 185: Mem. Geol. Surv. 
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