GBEAT OOLITE: BATH. 
267 
the base of the Great Oolite, which was exposed on the high 
ground north-west of Charlcombe, I obtained Trochus Bunburyi, 
Lucina bellona, and Echinobrissus. Lansdown is the locality 
where the " Lansdown Encrinite," Millericrinus Pratti, was first 
obtained from the Great Oolite.* 
A tiny outlier of Great Oolite occurs on the Round Hill at 
Kelston, as noted by Sir A. C. Ramsay.t 
The Great Oolite is quarried in places on Charmy Down, north- 
east of Lansdown, where we find false-bedded shelly, oolitic, and 
sandy limestones. I saw no evidence there of beds higher than 
the freestone division. The rock has been quarried on Little 
Salisbury Hill to the south, and again on Bonner Down, north- 
east of Batheaston. Where the full thickness of the Great 
Oolite is represented it is probably from 100 to 110 feet.f 
There are a number of quarries to the east of Box, and south 
of the railway-tunnel, where the general sequence is as 
follows : 
FT. IN. 
Rubble - 
Fine pale and fissile oolites, 
with softer marly beds, 
shelly in places, and 
much false - bedded. 
Harder beds of fine- 
grained oolite at or near 
the base are known as }>20 to 35 
Scallett (in places 10 feet 
above Scallett Rag), and 
have been used for carv- 
ing and ashlar : they do 
not furnish a weather- 
Upper J stone, and are seldom 
Division. [ quarried now-a-days _ 
Coarse shelly oolites; one bed 
known as the Scallett Rag or 
White Rag ; in some places di- 
vided into Black, White, Malmy 
and Red Rags - 5 to 10 
False-bedded oolite, known as Corn 
Grit, and employed for dressings 
15 Oto 20 
Poof -bed, forming the ceiling or 
roof of the mines ; a hard coarse 
shelly oolite : too hard to be of 
much service, but employed for 
road-stone, when worked 3 to 5 
Oolitic freestone or Ground Bed, 
somewhat variable in character, 
but yielding good weather-stone, 
and employed for plinths, strings, 
cornices, &c. - - 12 to 14 
Stone-beds (proved in well) 
30 Oto 40 
"Fnllonian fday (" red marl ") and dark blue 
'(Fuller's Earth). \ marly clay with "beef." 
Lower 
Division. 
* See P. H. Carpenter, Quart. Journ. Geol. Soc., vol. xxxviii. p. 29. 
f Hor. Section, Sheet 14, No. 2. 
J See Memoirs of W. Smith, by J. Phillips, p. 59. 
See also Lonsdale, Trans. Geol. Soc., er. 2, vol. iii. p. 253. 
