To the Norwich Geological Society. 
of France reveals the fact that Coal- 
measures are found sometimes at 
depths of only 800 or 400 feet be- 
neath the Chalk and Tertiary strata. 
And here they are accompanied, 
seemingly in perfect conformity, by 
Devonian rocks, like those found 
under London. 
With these facts before us, there 
can be no question that there is 
great probability of productive Coal- 
measures being met with in the 
east of England. And we must 
give all honour to Mr. Godwin- 
Austen for having suggested this 
before any one of these borings had 
been made. 
On the Continent the Paleozoic 
rocks are remarkably disturbed, and 
even inverted, thus presenting many 
features in common with the strata 
on the Mendip Hills. It is these 
disturbances which prevent any 
accurate calculations being made as 
to the probable position of the 
Coal-measures here or there, from 
the facts at present told by our 
deep borings. 
Professor Prestwich, in his re- 
marks on the Devonian rocks at 
Meux’s brewery, was led to infer 
that Coal-measures might be met 
with to the north of a line drawn 
between Maidstone and London; 
but he added that “the Paleozoic 
strata are so disturbed and folded, 
that neither the dip nor the relative 
position of the Devonian beds 
afford any certain guide to the posi- 
tion of the Carboniferous trough.” 
Since these remarks were made, 
the Silurian rocks have been de- 
tected at Ware. That discovery 
may, however, in no way affect the 
matter, as in the Dudley Coal-field, 
the Wenlock beds rise up in prox- 
imity to the celebrated ten-yard 
seam of coal. 
Concerning the slaty rock at 
‘Harwich, Professor Prestwich has 
wa 
Subwealden boring. 
London. 
Ware. 
Harwich. 
Diss, 
Norwich. 
N. Wells. 
s 
3) 
n 
1 
1 
\ 
d 
1 
1 
' 
1 
' 
1 
i 
1 
q 
' 
1 
=] 
leve 
= 
CP et 
- 
75 
Vertical Scale—2000 feet to ? inch. 
Longitudinal Scale—25 miles to 1 inch. 
