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apparently of subsidence, and overlaid by Oolitic drift, which covers 
all the superior deposits. About 25 feet of these Shales are exposed, 
distinguished by their well-marked character, no less than by the 
Liassic Cephalopoda, portions of which are abundant. The Shales are 
overlaid by the ‘‘ Sands,” aseries of alternating micaceous Sands and 
Sandstones, from 60 to 80 feet thick, which appeared to be wholly 
unfossiliferous. To these ‘‘ Sands” succeeds the Inferior Oolite rock, 
about 25 feet in thickness, and exhibiting the following succession 
of beds, which will be found to be remarkably persistent in character 
and extent throughout the Bath district :-— 
1. Basement bed.—A hard rock, full of fossils, and 
especially characterised by the prevalence of Zii- } 4 to 5 feet. 
gonta costata and Rhynchonella spinosa 
2. Coarse Bastard Freestones—Rubbly in their 20 feet 
upper portions—slightly fossiliferous. re 
Now, the point to which I particularly desire to invite attention, 
is to the fact of the Zrigonia and Spinosa Beds, forming the base of 
the series, and to their being surmounted by 20 feet of freestones ; thus 
apparently inverting the order of sequence exhibited in the Cottes- 
wold sections, and I shall endeavour to show that this relationship 
holds good throughout the Bath district, extending even to Dundry 
Hill, where I found similar conditions prevailing. 
INFERIOR OOLITE BEDS AT LYMPLEY STOKE. 
On the line of railway between Bath and Bradford, and about 
three miles from the latter town, is the pretty village of Lympley 
Stoke, looking down upon the Valley of the Avon, whose green ex- 
panse is diversified by the frequent windings of the stream, and by 
the Trowbridge Canal, which traced along the foot of the hills 
forming the opposite boundary of the valley, is flanked for probably 
two miles of its course by the beds of the Inferior Oolite, which, 
emerging from beneath the clays of the Fuller’s Earth, present a 
mural escarpment of extreme regularity until eventually lost beneath 
the overlying beds, under which they dip at_a scarcely appreciable 
angle within a short distance of the town of Bradford. The extent 
and regularity of this section render it extremely valuable for the 
study of the Inferior Oolite series in this district, and it will be 
found to present characters in all respects similar to those exhibited 
by the same beds at Charlcombe. 
The Canal is at this point hollowed out of the “‘ Sands’”’—a sub- 
soil one would imagine, not very well adapted for the retention of 
water, and about two or three feet of the sands are exposed above 
the level of the Canal. Resting on these sands is the “‘ basement-bed”’ 
of the Inferior Oolite, about three feet in thickness, charged with 
fossils, amongst which Zirigonia costata and Rhynchonella spinosa are 
abundant. The texture of the rock is extremely hard and intract- 
able, which renders it difficult to extract fossils in good condition. 
Trigonia costata is most frequently present in the shape of casts; 
