LIAS OP ENGLAND AND WALES: 
In a quarry north of Street, near Pylle, the same beds have 
been exposed, yielding Pholadomya, and other fossils. Lima 
pectinoides also occurs in this neighbourhood. These beds belong 
to the zone of Ammonites Bucklandi ; and it is likely that they 
are faulted on the south, owing to the nearness of the Middle 
Lias on Pertoard Hill. 
Northwards, at Beard Hill and around Pilton, the beds are 
clearly faulted, mostly in an east and west direction, roughly 
parallel with the folds in the older rocks of the Mendip Hills. 
Fractures and disturbances have in places modified the particular 
relations of the Lias to the Mendip range. Near Shepton Mallet 
and Wells, the Lower Lias extends ou to the older rocks of 
Mendip ; and judging by the outliers of Harptree Hill and 
Ashwick, it evidently crossed the plateau in places, if it did not 
entirely envelope that region. Westwards at Wedmore the beds 
dip away from the Mendips. 
West of Pilton a quarry showed blue limestones and clay with 
Ammonites p/anorlis and A, angulatus, capped by white rubbly 
and raarly limestones and clay. These pale limestones were 
shown also in a quarry north of Westholrne House, and in the 
Great Western railway-cutting west of Shepton Mallet (p. 87). 
A section on the Somerset and Dorset (Midland) railway, east 
of Cannards Grave, and south of Shepton Mallet, showed the 
following section : * 
o . 
S! 
Lower , 
Lias. ' 
f Dark bluish-grey mottled limestone (full of 
Belemnites), pale marly beds, earthy and 
iron-shot limestone and clay - about 
Thin stone and clay. 
^ Blue clay with bands of grey earthy lime- 
stone, yielding small pyritic Ammonites, 
A. oxynotus, A. bifer, Belemnites, Avicula, 
Gryph&a arcuata, Lima, Pecten, Rhyn- 
chonella variabilis, Pentacrinus, &c. about 
f Hard blue sandy limestone, weathering 
yellow: Ammonites Conybearei 
Massive even-bedded limestones (8 or 9 beds): 
Nautilus, Gryphaa arcuata 
Thin irregular limestones and blue shaly 
clays, in riband-like beds the stone-beds 
stained yellow in places. Ammonites 
Bucklandi, Lima gigantea (large) - 
FT. IN. 
6 
S 
L 
N. 
Hard marly limestone 
Grey marly clays with 
Modiola minima - 
indurated band : 
23 
6 
1 3 
\ Mottled somewhat earthy limestone, like") 
| Sun -bed in places - - - | 
Rhsetic J White J Hard compact limestone - - - I 
Beds. 1. Lias. ] White Lias limestones and bluish marly f 
| shales, with beds of creamy and bluish j 
l^ limestone : Modiola minima, Ostrea liassicaj 
* Sec also Geol. East Somerset, &c., p. 101. 
