DR. HENRY WOODWARD ON EAST ANGLIAN GEOLOGY. 487 
The greatest depth of a well at Norwich appears to be that at 
the workhouse which did not exceed 3G0 feet. 
At Harwich (Essex), a boring passed through the following 
strata : — 
Drift 
London Clay and ( 
Reading Bei | 69 '“*• 
Chalk 890 „ 
Gault 70 „ 
1029 
Palaeozoic Rocks 69 „ 
At a depth of 102!) feet the borer entered a slaty rock which it 
penetrated for G9 feet, when the boring was terminated.* 
Professor Prestwich assumed that this slaty rock was of Carboni- 
ferous age, on account of the supposed presence of Posidnnomya. 
But the organic nature of this fossil has been doubted by Mr. 
Etheridge, F. R.S., and Professor W. W. Watts, who recently 
examined it. 
Professor Watts has detected an Orthoceras in the same rock 
from the Stutton boring. 
Culford Boring, near Bury St. Edmunds. 
A Boring was undertaken in 1890 — 91, north of Culford Park, 
five miles N.N.W. of Bury St. Edmunds, to obtain water for new 
buildings on Earl Cadogan’s estate. The bore-hole yielded the 
following particulars : — 
ft. in. 
Soil, &c. ... 
6 
0 
Chalk 
... 526 
0 
Gault 
... 73 
0 
Lower Greensand ... 
... 32 
6 
Palaeozoic Slaty Rocks 
... 19 
9 
657 
3 
Messrs Whitaker and Jukes-Browne say — “there is only one 
point on which all are agreed, namely, that these Culford Slates are 
older than the Coal-Measures.” t 
Stutton Boring. 
On the Northern side of the estuary of the Stour the Eastern 
* [Annual Report of the Geol. Survey for 1896]. 
t Quart. Journ. Geol. Soc. vol. 50, p. 495. 
