RELATIONSHIPS OF THE AUSTRALIAN CAINOZOIC SYSTEM. 
remarks* as follows :—‘‘ So far as the Muddy Creek itself is con- 
cerned, all the beds consist of the clayey and calcareous layers 
already noticed, but in the Grange Burn, fossiliferous strata of a 
different character appear, which have not, I think, been referred 
to by any previous geological writer. They form a rather friable 
rock, composed mainly of bryozoan remains, with spines of echini, 
and occasional shells, chiefly pectens, scattered through it. In 
outward appearance, it resembles almost exactly the strata on the 
Crawford River, about halfway between Muddy Creek and the 
south coast of Victoria. Somewhat similar strata are also found at 
Apsley, on the western boundary of Victoria, and also at Narracoorte, 
in South Australia. Those at the last-named place are described 
by Professor Tate under the name of ‘ polyzoal rock,’ which in 
his classification of the Australian Tertiaries he has placed as ante- 
cedent in age to the Muddy Creek shell beds. In one place only 
Muddy Creek So 
Fig. ly. Porrroar Rocke RESTING ON BaALCOMBAN, S.BANK 
oF MuODY CREEK, 20 CHAINS N.w. oF CLIFTON 
BAnk. A= BALTOMBIAN BLVE CLAY ; B= BALCOMB- 
TAN BROWN SHELL MARL | C = POLX LOAL LiIP(ESTONE. 
UJANJUKIAN) insiTu. ‘ 
have I seen the strata in close proximity, and there the polyzoal 
rock appeared to underlie the shell beds. As, however, I was unable 
to trace actual contact, I am not prepared to speak definitely 
on the point. As I said before, this rock is nowhere visible in 
* Trans. Roy. Soc. 8. Australia, vol xi., 1889, p. 34. 
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