VOL. XIX. (i) DEEP BORING— TETBURY WATERWORKS 
6 1 
Forest Marble. — As is well known from the writings of 
Hiill,^ James Bnckman,^ and H. B. Woodward, it is often 
difficult to know where to draw the line of division between 
horest Marble and (xreat Oolite in the country around Tetbury 
and Cirencester. 
W'oodward has shown clearly enough where he thinks it 
should be drawn at Veizey’s or “ Maze’s ” Quarry, distant 
half-a-mile in a west-north-westerly direction from the Water- 
works. At this quarry, in the deepest part, about 15 ft. from 
the top, is a bed of clay (from i to 3 ft. thick), which Wood- 
ward obviously considered occupied the stratigraphical posi- 
tion of the Bradford Clay. Below it is Oolite — seen to a depth 
ot from 20 to 24 ft. — which he called “ Kemble Beds.” Below 
these Kemble Beds, he stated, came the “ White Limestone 
series,” which, however, was not exposed.^ 
I endeavoured to identify in the cores at the Water- 
works the beds equivalent to those seen in Veizey’s Quarry ; 
but was not successful. The beds down to 21 ft. 3 ins. are 
typical Forest Marble. Those between 17 ft. 9 ins. and 21 ft. 
3 ins. contain ” clay galls ” similar to those seen in the hard 
layers between the surface and 27 ft. down in the Shipton- 
Moyne bore-hole.'^ 
Great Oolite. — ^The beds 4, 6, 8, 10 to 13, and 15 — 
brownish-grey, oolitic limestones — are very similar to each 
other, are unlike the Forest-Marble beds in that they lack the 
characteristic blue colour and the abundance of oysters, and 
would appear to be referable to the Kemble Beds. At Veizey’s 
Quarry, however, the Kemble Beds are massive — if often false- 
bedded — oolitic limestones, and do not include such beds as 
the deposits of brown sand (5),'’ brown marl (7) and tough clay 
(9). The clay of bed 9 was precisely similar to the clay bed on 
top of the Kemble Beds at Veizey’s Quarry. 
'i " Geology of the Country around Cheltenham ” (1857), pp. 65, 66. Mem. Geol. Surv. 
2 Quart. Journ. Geol. Soc., vol. xiv. (1858), p. 113. 
3 “ Jurassic Rocks of Britain : ” vol. iv. (1894), " The Lower Oolitic Rocks of England (\’ork- 
shire e.xcepted),” p. 271. .Mem. Geol. Sur\-. 
4 /(/., p. 276. 
5 Sec Proc. Cotteswold Nat. F.C., vol. .xi.x., pt. i (1913), p. 50. 
6 Dr. P. G. H. Boswell has very kindly examined a small sample of this sand for me and reports 
that it contains “ an abundance of shell fragments, oolitic grains, pieces of spines, etc. On treating 
with hvdrochloric acid it goes down in bulk very much by the solution of calcareous matter, and, 
after warming and consequent solution of iron hydrates, etc., a verv' little fine-grained angular quartz 
sand remains. The rest of the deposit was, of course, rather large-grained. On treatment of the 
original sample with bromoform of density 2.83, very little residue — consisting almost entirely of 
authigenic mineral fragments (limonite, marcasite and ? pyrrhotite) — was obtained. Those were 
probably in part due to organic action. Coarse ilmenite, very badly altered in parts to leucoxene 
of whitish colour, is very common. 
