Arkell.1956.Jurassic..

462 AUSTRALASIA
Queensland the total thickness of freshwater beds assigned to the Jurassic
exceeds 2500 m. In Victoria the thickness is about 1200 m.
The chief fossils are plants, belonging to an abundant cosmopolitan
flora, of which most of the elements have a range from Lias to Kimeridgian.
Some closely resemble Middle Jurassic plants of Yorkshire. In certain
places there are remains of fish and, much more rarely, saurian reptiles
and shells of Unio. (For details see David & Browne, 1950, ch. X,
especially palaeontology, pp. 465-9.)
A doubtful record of a Coroniceras, often mentioned in the literature,
has been kindly investigated by Professor F. W. Whitehouse and Dr
R. O. Brunnschweiler, who allow me to state that they are fully convinced
that it is based on an error. The specimen is in the Queensland Museum.
Its matrix and type of preservation are unlike anything known from
Australia, and the reports of the Hann expedition (on which the label
alleges it to have been found) make no reference to such a find, although
all fossil localities are carefully noted. 'All their collecting grounds for
marine fossils have been visited and have yielded only the familiar forms'.
(R. O. Brunnschweiler in lit., 1953, quoting Professor Whitehouse, who
believes the specimen came from Europe and, judging by the preservation,
probably from South Germany.)
The lake beds are assumed to span the whole of the Jurassic system,
but correlation is by lithology from place to place, aided by plant-beds,
and the only pointer to general correlation is the fact that at Mount
Hill, south-east of Geraldton, as mentioned above, the local freshwater
beds are overlain by the Middle Bajocian marine Newmarracarra Limestone.
Elsewhere, in the east, they pass up conformably into the
Cretaceous.
Volcanic activity in Australia is proved by the occurrence of rhyolitic
lavas, tuffs and agglomerates, with trachytes, dacites, andesites and
andesitic tuffs, interbedded near the bottom of the lake beds in Queensland,
and by olivine basalts in the upper part of the series in New South
Wales. In Victoria there are felspathic sandstones which are regarded as
tuffaceous. (David & Browne, 1950, p. 473.)
http://jurassic.ru/