172 LIAS OF ENGLAND AND WALES! 
The compact bed of limestone was included in the Lower 
Lias by Mr. Wilson, but it is probably equivalent to a band, of 
similar character and position at Coddington, which I regard s.s 
the top of the Rhaetic Beds.* 
At the Lime- works at Barnstone the following section was 
shown 
FT. IN. 
Contorted clayey soil and drift - - - -20 
""Pale argillaceous limestones. Two SKEBKIES, and clay - 2 
Racy clay - - - - -24 
Two or three beds of limestone. FIRST AND SECOND 
URRS, thick and thin beds used for paving floors - 1 8 
Grey shale - - 2 6 
Best stone. NINE-INCH BED, pale and banded earthy 
Lower 
Lias limestone . - "- - - "-09 
Zone of < ei, i 11 
A j bhale - - - - - - -1 
, ',. Two or three beds of limestone. RUMMELS - - 1 4 
planorbis. \ ghale _ _ _ _ i 7 
Limestones. EIGHTEEN-INCH BED. TOP AND BOTTOM, 
wavy-banded and pyritic limestone (like bed at Glen 
Parva) - - ' - - - - 1 6 
Shale - 16 
Grey argillaceous limestone. BOTTOM FLOOR. (Water) 8 
Shelly layers occur in the shales, and there are obscure Bivalves 
(Pullastra ?), small Inoceramus ?, Ostrea liassica, Spines of Echini, 
and remains of Plcsiosaurus and Ichthyosaurus. 
Northwards, the limestones have been worked at Granby, East 
Gotham Hill, near Long Bennington, and Coddington. Ammonites 
planorbis, Cardinia, &c. have been met with at Granby and 
Gotham ; and species of Montlivaltia at Balderton.f 
The total thickness of the basement-beds of the Lower Lias 
(zone of A. planorbis) is about 30 feet. 
According to Mr. Jukes- Browne, the zones uf Ammonites angu- 
latus and A. Bucklandi consist of dark blue clays with occasional 
bands of septaria and thin limestone. The fossils, which are 
sometimes pyritic, include Ammonites, Nautilus, Grypli&a arcu- 
ata, Lima gigantea, &c. The beds are seldom exposed, but they 
have been opened up in brickyards near Bottesford, and in other 
places near Redmile ;J and probably also in Kinoulton brickyard 
to the south-west. 
The zone of Ammonites semicostatus is represented partly by a 
band of ferruginous limestone and ironstone, containing Ammonites 
semicostatus, Cardinia gigan-ea, C. Listeri, Gryphcea arcuata, and 
other fossils. As remarked by Prof. Judd, the bed makes a con- 
spicuous feature in the Yale of Belvoir, and exhibits mineralogical 
characters, which have caused it to be mistaken for the Rock-bed 
of the Marl stone. (See Fig. 53.) 
* Geol. Mag. 1874, p. 480. 
f See also Jukes-Browne, Geol. S. WV Lincolnshire, (Mem. Geol. Survey, Sheet 70), 
p. 24. 
\ Geol. S.W. Lincolnshire, pp. 28, 29. See also Fig. 1, p. 10. 
