NOTE ON THE GEOLOGY OF SUNDAYS RIVER. 
241 
such evident traces are visible, 
itched away towards the feet of 
the Winterhock and Zuur- 
berg mountains : when the 
Enon conglomerate was roll- 
ing shingle on the beach, 
when over that subsiding 
stratum the sediment of ages 
was forming the sandstones 
of the Zwartkops and Sun- 
days Rivers, under the dark 
blue waters in which the 
ammonites, trigoniae, pinnas, 
and numberless other crea- 
tures, whose remains we find, 
lived and died. 
Portions of those sand- 
stone strata must have in 
their turn emerged, for a 
time, and become dry land, 
and their surfaces have been 
^ covered with vegetation 
0 whose vestiges are now 
^ shown in the fossil ferns, &c., 
1 found in the neighbourhood 
^ of the latter river : and they 
V, were again covered by the 
I advancing ocean while the 
w upper conglomerate and 
^ clays were accumulating, 
with all their more recent 
fossiliferous treasures ; and 
for the whole of this enor- 
mous period must those 
rugged and weather-beaten 
hills, from their bare ap- 
pearance and present posi- 
tion, have stood undaunted 
by sunshine or wintry blast 
as islands in the ancient 
main, calm spectators of 
the mighty changes that 
took place around. Our expe- 
dition was, however, brought 
to a sudden conclusion ; and 
many of our intended ob- 
servations were obliged to 
be left unfinished. 
VOL. IV. 
