MIDDLE LIAS ! GLASTONBURY. 207 
At Trent, north-e;ist of Yeovil, the Marlstone is about 15 inches 
thick. A quarry north-west of Trent Barrow, exposed tough 
brown and grey sparry limestone, with nodules of pale compact 
limestone, and oolitic grain?. Here, as in other places, the base- 
ment-beds of the Upper Lias are shown above the Marlstone. 
Further on, at Coneygore Hill, Sandford Orcas, the Rock-bed is 
stated to be 4 feet thick, in a section noted by Moore, and near 
Sutton Montis to be 6 feet, as observed by Bristow. It has been 
traced through Compton Pauncefoot, but no sections have been 
noticed near Castle Gary. The description of the beds in a 
section at Scale Hill, near Batcombe, by De la Beche, is probably 
a general one, as the Marlstone, although present, does not appear 
to comprise a mass of strata 21 feet thick, as stated by him.* A 
rock-specimen of Marlstone, micaceous and ;sandy limestone with 
Belemnites, Rhynchonella, and Terebratula, was obtained at West- 
combe, west of Batcombe. f 
Of the lower beds we have little information, beyond the fact 
that there is a development of micaceous sandy shales and sands, 
in the country extending from Trent, near Yeovil, through South 
and North Cadbury to Batcombe. In the valley south o Batcombe, 
there are brown micaceous and marly sands, with Ammonites very 
poorly preserved. Probably the Lower Lias is not exposed so 
near the Oolitic escarpment as represented on the Geological 
Survey map ; but north of Batcombe the Middle Lias has not 
been shown on the map until we reach the neighbourhood of 
Bath. In the intermediate area it may be partly overlapped by 
Inferior Oolite and Midford Sands. 
North of West Pennard Church, the lower beds of the Middle 
Lias are exposed in a lane-cutting, and the beds have also been 
exposed by the stream near East Pennard Church. The Rock- 
bed has been opened up beneath the Upper Lias to the east of 
West Pennard. The general section is as follows (see Fig. 43, 
p. 90):- 
FT. IN. 
"Hard blue and brown ferruginous oolitic, 
and in places compact, Marlstone, with, 
near the top, irregular nodules of grey 
earthy limestone - - 1 3 
Micaceous sands with Belemnites, and 
oehreous, clayey beds, with thin alter- 
Middle Lias. -^ nate layers of sand. 
Thick-bedded yellow micaceous and fissile 
rock-sands, with oehreous galls, and 
occasional large concretionary masses of 
bluish sandy limestone - - 40 feet or more. 
Bluish-grey and yellow sandy micaceous 
shales. 
The lower beds, consisting of blue and brown clay with " race," 
and micaceous sandy shales with ferruginous concretions and 
occasional indurated bands, have been opened up in brickyards to 
the north of Glastonbury, where red bricks, tiles, drain-pipes, 
* Mem. Geol. Survey, vol. i., p. 280. 
| Catalogue of Rock Specimen*, No 23. 
