Australasian Fossils: A Students' Manual of PalaeontologyChapman, Frederick
Science
Australasian Fossils: A Students' Manual of Palaeontology
Chapman, Frederick
Paleontology -- Australia
The widely distributed pinnate fern known as _Thinnfeldia_ is first found
in the Trias; in the Narrabeen shales near Manly, and the Hawksbury
sandstone at Mount Victoria, New South Wales. It is also a common
fossil of the Jurassic of South Gippsland, and other parts of Victoria.
The grass-like leaves of _Phoenicopsis_ are frequently met with in
Triassic strata, as in the upper series at Bald Hill, Bacchus Marsh, and
also in Tasmania. The large Banana-palm-like leaves of _Taeniopteris_
(_Macrotaeniopteris_) are common to the Triassic and Lower Jurassic beds
of India: they are also met with in New Zealand, and in the upper beds at
Bald Hill, Bacchus Marsh.
[Illustration: =Fig. 60.--MESOZOIC PLANTS.=
A--Thinnfeldia odontopteroides. Morris sp. Trias. N.S. Wales.
B--Cladophlebis denticulata, Brongn. sp. var. australis, Morr.
Jurassic, Victoria.
C--Taeniopteris spatulata, McClell. var. Daintreei, McCoy. Jurassic,
Victoria.
D--Brachyphyllum gippslandicum, McCoy. Jurassic, Victoria.
E--Ginkgo robusta, McCoy. Jurassic, Victoria.
]
=Jurassic Plants.--=
The Jurassic flora of Australasia is very prolific in plant forms.
These range from liverworts and horse-tails to ferns and conifers. The
commonest ferns were _Cladophlebis_, _Sphenopteris_, _Thinnfeldia_
and _Taeniopteris_. The conifers are represented by _Araucarites_
(cone-scales, leaves and fruits), _Palissya_ and _Brachyphyllum_ (Fig.
60). The _Ginkgo_ or Maiden-hair tree, which is still living in China
and Japan, and also as a cultivated plant, was extremely abundant in
Jurassic times, accompanied by the related genus, _Baiera_, having more
deeply incised leaves; both genera occur in the Jurassic of S. Gippsland,
Victoria, and in Queensland. The Jurassic flora of Australasia is in many
respects like that of the Yorkshire coast near Scarborough. In New Zealand
this flora is represented in the Mataura series, in which there are many
forms identical with those of the Australian Jurassic, and even of India.
=Cretaceous Plants.--=
An upper Cretaceous fern, (?) _Didymosorus gleichenioides_, is found in
the sandstones of the Croydon Gold-field, North Queensland.
=Plants of the Cainozoic.--Balcombian Stage.--=
The older part of the Cainozoic series in Australasia may be referred
to the Oligocene. These are marine beds with occasional, thick seams of
lignite, and sometimes of pipe-clay with leaves, the evidence of river
influence in the immediate neighbourhood. The fossil wood in the lignite
beds appears to be a _Cupressinoxylon_ or Cypress wood. Leaves referable
to plants living at the present day are also found in certain clays,
as at Mornington, containing _Eucalyptus precoriacea_ and a species of
_Podocarpus_.
[Illustration: =Fig. 61.--CAINOZOIC PLANTS.=
A--Cinnamomum polymorphoides, McCoy. Cainozoic. Victoria.
B--Laurus werribeensis, McCoy. Cainozoic. Victoria.
C--Banksia Campbelli, Ettingsh. Cainozoic. Vegetable Creek, N.S.W.
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