File:The Quarterly journal of the Geological Society of London (13859814045).jpg

H. KEEPING ON SOME SECTIONS
In ascending order (see fig. 1), at the base is Kimmeridge Clay.
This is well seen here, the junction with the Lower Sands and Grits
being exposed at that portion of the excavation where they are
now digging sand for the foundries and in the tram-incline. The
uppermost beds are laminated bituminous flaggy shales, the " slaty
and shaly bed " of Prof. Judd (I. c. p. 248). They are blackish-
brown in colour

they have the characteristic appearance of bitu-
minous Kimmeridge shales, and contain several distinctive fossils,
such as Belemnoteuthis antiquus, Pearce, Ammonites bijolex, Sow.,
fine var., Discina latissima, Sow., also a Posidonomya, Pecten, and
Astarte.
Fig. 1. — Diagram of Claxby Ridge.
Ki'TnTn Clay
a. Lower Grits and Sands, b. Ironstone, c. Grey clay with nodules.
d. Tealby Limestone, e. Upper Sands.
Below the hard flaggy shales are strong sticky grey clays.
There are fully 250 feet (by barometric measurement) of these
Kimmeridge beds down to the floor of the valley by the railway.
In places at junction with the Neocomian sand phosphatic
nodules may be found at the base of the latter.
The Lower Sand and Grits (a) consist of various shades of greenish
and brown-green

the sands are coarse and contain the black-coated
grains so common in the Carstone

sometimes the sands are
mottled with spherical brown patches, which in the consolidated
sand-rock weather out with concentric structure, as mentioned
by Prof. Judd (L c. p. 248). The bands of grit in the sand are
rather discontinuous. At the top of the sands is one bed about 2 feet
thick, which is fairly constant all along the terraced ridge from
Nettleton

it is fossiliferous

but the fossils are difficult to