NOTE ON THE GEOLOGY OF SUNDAYS RIYER. 
239 
the waters shal- 
lowed towards the 
ancient shore. That 
the strata marked 
4 were more even in 
thickness, I should 
imagine, arose from 
their being depo- 
sited in deeper 
water ; the inter- 
vening portions 
must have once ex- 
tended from their 
present position to 
the shoulders of the 
hills mentioned ; 
but have since been 
denuded by the 
same influences that 
have formed the 
present bed of the 
Koega River. 
This section I 
have looked upon 
as a most beautiful 
exemplification of 
an ancient island in 
the primeval ocean. 
Not far above us 
arose those time- 
worn quartzite hills 
that had been ex- 
posed to the scorch- 
ing suns of un- 
kno-VNTi summers — 
summers at a period 
so remote that num- 
berless races have 
appeared and dis- 
appeared from the 
face of the earth 
since their tops first 
emerged from the 
deep. Never since 
that time have they 
sunk so much as to 
have been again 
covered by the surrounding waters, but must have remained islands 
in the distant main when a magnificent and glorious estuary, of which 
