THE MIDDLE LIAS OF NORTHAMPTONSHIRE 
211 
there were no fossils to be seen, and moreover the stone 
could only be found at this one place. They are probably 
pieces of the rock-bed that have got there by accident. The 
bed “L” is apparently absent for a considerable distance 
along this valley, for a few months ago I found a heap of 
material that had been recently thrown out in deepening the 
brook for a sheep wash, and there was no trace of a hard bed. 
There are two other sections, nearer Day Ian owl, where a 
light grey clay is succeeded abruptly by a dark blue clay or 
shale, and these are commonly supposed to show the junction 
of the Middle and Lower Lias (Survey division). 
Between Catesby and Staverton there are no sections to 
be seen in the valley, but the base of the beds I am here 
describing can be traced by the numerous springs which issue 
from the side of the escarpment. On the west of Staverton 
there is a rather steep lane, and at the bottom of it a good 
section, exposing the lower beds of the “ Margaritatus” Zone. 
Section at Staverton. „ , 
Feet. In. 
G. 1.—Soil and light-coloured sandy bed, not so 
micaceous or fossiliferous as the soft beds 
below. Not well exposed ... ... ... 8 0 
H 2.—Soft, porous sandstone or limestone, very ferru¬ 
ginous, containing many fossils:— Protocardium 
truncation (abundant), Avicula incequivalvis, 
Pleuromya costata, Plioladomya ambigua, Penta- 
crinite stems, dc _ ... ... ... ... 2 9 
I. 3.—Sandy micaceous clay, ferruginous in places, 
containing :— Pecten liasinus, Limea acuticosta , 
Protocardium truncatum, dec. ... ... .. 4 0 
J. 4.—Calcareous and ferruginous sandstone, interior 
of bluish or slaty colour, containing:— Proto¬ 
cardium truncatum, Limea acuticosta, Pleuromya 
costata, Pentacrinite stems, Fucoicls (abundant) 2 0 
K. 5.—Sandy clay, light coloured, micaceous and ferru¬ 
ginous, containing a fair number of fossils, but 
these mostly casts .. ... ... ... 5 9 
At this point a strong spring issues from 
the rock, and has cut deeply into the next bed. 
L. G.—Hard fossiliferous limestone, ferruginous, in 
places made up of fossils, in others cellular, 
the cavities being lined with crystals of calc 
spar. Some parts of the face covered with 
deposited carbonate of lime, making it almost 
like a stalactite in appearance. Containing : — 
Belemnites, Pecten cequivalvis, Pecten Rasmus, 
lAinea acuticosta, Protocardium truncatum, 
Astarte striato-sulcata, dc. 
1 4 
