A MARINE EARLY CRETACEOUS FAUNA. 9 
series. If the record should prove correct, the possibility #mst be con- 
sidered that these two faunas are equivalent — whereupon the Iotrigonia 
faunas might persist to the Hauterivian. But not only is the Morven 
record doubtful but no species or genera are common to the two very 
meagre collections. Thus for the present it is advisable to conclude 
that the Iotrigonia fauna is Yalanginian (or near-Valanginian), but 
that at least one other Neocomian marine incursion may have taken 
place into the pre-Aptian lacustrine area of Queensland. 
LOCAL ASPECTS. 
Mr. Reid states that the bed with the fossils is apparently not more 
than one foot in thickness and is interbedded in sandstones that are 
presumed to be part of the Mesozoic sediments of the Stanwell coal 
basin; and that the locality is but 100 feet from the prominent east- 
west “ Stanwell fault” where the Mesozoic beds to the south are vertical 
and in juxtaposition with andesites of the Lower Bowen (Permian) 
volcanics to the north. 
The rocks of the Stanwell area have been described by Dunstan 
(1898). The major portions of the sediments, covering an area of 
approximately 70 square miles, are sandstones, shales and coals of the 
Stanwell Coal Measures. They have a minimum thickness of 700 feet 
and have yielded the following flora 2 which Walkom has determined 
to be of Jurassic age : 
Equisetites cf. rajmahalensis O. and M. 
Taeniopteris spatulata McClell. 
T. spatulata var. major Seward. 
T. crassmervis (Feist.) Walkom. 
T. tenison-woodsii (Eth. fil.) Dun. 
PTiyllopteris feistmantelii Eth. fil. 
Ptilophyllum pecten (Phillips) Seward. 
Araucarites polycarpa (Ten.-Woods) Walkom. 
Elatocladus planus (Feist.) Walkom. 
Apart from the region beside the fault, the Mesozoic beds in this 
basin are horizontal or very slightly dipping, dips not exceeding 10°. 
Dunstan also records horizontal “ Desert Sandstone” beds lying 
unconformably on the Stanwell Coal Measures though none are shown 
in his map near the new fossil locality. The lithology of the Desert 
Sandstone was not discussed. A passing reference stated that it is 
ferruginous. Unfortunately, the term “ Desert Sandstone” has been 
used in Queensland for a great variety of material, including, more 
commonly than anything else, remnant of old lateritic soils. The refer- 
ence to the ferruginous nature of the “ Desert Sandstone” suggests 
that these also may be lateritic remnants. 
It is not likely that the fossiliferous bed is part of the “Desert 
Sandstone.” The hard, highly calcareous, brown sandstone is very 
typical of Mesozoic series of sundry ages in Queensland and quite 
unlike anything that any worker has placed in the 1 £ Desert Sandstone. ’ ’ 
As Reid has indicated in an unpublished communication, it is probable 
that the sediments are part of the Stanwell Coal Measures. 
2 Determinations by Walkom in his papers of 1915 and 1917. 
