360 PROCEEDINGS OF SECTION C. 
did I find included in the boulder-clay either of these classes of 
rock, With respect to the igneous rocks, it may be said that those 
of the trachytic type have a somewhat modern facies. The sani- 
dine crystals in the specimens prepared for the microscope were, 
for the most part, in excellent preservation. With regard to direct 
evidence, the following extract from the paper by Mr. Dennant, 
previously referred to, may be quoted :—“ An interesting discovery 
was made at the Mount Koroit outcrop. Almost at the top of the 
hill a shallow excavation of a few yards in diameter has disclosed 
a whitish felspathic tufa, small blocks of which now lie in the 
hollow. On breaking one of these blocks in two for convenience 
of transport, impressions of cycads were seen on both the fractured 
surfaces. Mr. Robert Etheridge, of Sydney, who has kindly 
examined some of the impressions for me, states ‘that very little 
doubt can exist that the plant is a Mesozoic cycad, called Otoza- 
mites. It also occurs in the Queensland beds of a like age.’ It 
should be mentioned that the sedimentary strata, amongst which 
these igneous rocks appear, are of acknowledged Mesozoic age.” 
This bed of tufa lying at a higher level than the railway-cutting 
through Mount Koroit is, possibly, connected with the trachytic 
group, which occurs in the neighbourhood of Coleraine ; but I am 
inclined to regard them as of later origin myself. It is scarcely 
probable that the volcanic cone Adam is of such antiquity, and 
between the trachytic dyke which penetrates it and the trachyte 
occurring east of the railway-cutting there is such a general resem- 
blance of microscopic structure that it is hard to resist the con- 
clusion that they are directly related to each other. 
Having regard to the general character of the included material 
and to the absence of Mesozoic rocks—which cover a large area 
south of the glacial beds—it on the whole seems most probable 
that the glacial beds are of Permo-carboniferous age. If this is 
so, the absence from them of the local igneous rocks gives a lower 
limit as to the age of these latter beds. 
The feature of the district is the wide area of grass-land over 
which striated stones, which have presumably weathered out of 
subjacent glacial beds, occur. If the age of the glacial beds be 
Permo-carboniferous, the underlying floor on which they were 
deposited is in all probability either granite or gneiss and schists of 
the metamorphic beds. Both of these rocks occur near Coleraine, 
and it is on the latter—gneiss—that the glacial outcrop at Wanda 
Dale subsequently referred to rests. 
WANDA DALE AREA. 
Wanda Dale Station, belonging to Mr. J. Moody, is situate 
about 12 miles N.N.W. of Coleraine, near the source of the Wanda 
River. In the bed of the river, at an elevation of about 700 feet 
above sea level, and about 1 mile west of the station, a deposit of 
