74 
NORTHERN Coast. 
Point Turton.—An interesting geological po was found 
at Point Turton, situated on the shores of Hardwicke Bay, 
about six miles in a north- EAN Pe direction from EWR 
geological formations separated by three lines of uncon 
formability. 
The following i is the order of occurrence: 
I. Jt reves limestone, variable in thickhess 
up to 20 feet 
| Reddish, ` mottled clay, preserved i in 
2. Miocene— eroded hollows of lower Tertiary 
limestone ; thickness nil to.. s MAL 
: Lua fEek- coloured fossiliferous limestone ; ; 
9. Focene \ variable in thickness up t saat 
: Boulder ciay, with an. er rratics ; 
ie Pre-Tertiary | thickness unknown ; d sega above 
won] low. wa ter : 15 « 
The Miocene clay is best seen eue a pen Peut. a kuadro 
ards west of the jetty, and has been preserved from denuda- 
tion through occupying an eroded trench in the Eocene lime- 
stone, the latter having been nearly cut through by the 
eroding agents. 
The Eocene i of the section is, as a whole, an ex- 
tremely compact and pure carbonate of lime. It has been 
subjected to coundi alteration and reconstruction in 
situ, a secondary deposit of calcium carbonate having been 
precipitated within the interstices of the re bed 
into strong relief, can be seen. The great purity of the 
stone makes it valuable as a fluxing agen 
The Eocene beds rest unconformably on the eroded surface 
of the glacial clay, the line of junction being very sharp. 
The boulder clay is exposed for some distance in a variable 
thickness up to fifteen feet, and passes below sea Jevel. The 
varying regen of the bed is evidently the result of suberial 
waste that took place in pre-Tertiary times, before the ol 
land Bard was submerged by the Eocene sea. The clay 
, ex 
below high-water mark, and even in that position it main- 
ei a Food hard floor that can be walked over without pud 
mfort. 
