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Allen, H.-J., Grey, K. & Haines, P.W., November 2015. Systematic description of Cryogenian Aralka Formation stromatolites, Amadeus Basin, Australia. Alcheringa 40, xxx–xxx. ISSN 0311-5518Recognition of stratigraphically constrained stromatolite assemblages has been useful in Australia-wide correlations of Neoproterozoic successions, and in particular in recent Geological Survey of Western Australia and Northern Territory Geological Survey revisions to Neoproterozoic–Cambrian stratigraphy and correlations in the Amadeus Basin, Australia. The Aralka Formation, a proven hydrocarbon source in the Northern Territory, previously mapped in only the northeastern part of the Amadeus Basin, is now recognized across much of the basin. The discovery of new outcrop and drillhole intersections with stromatolite occurrences has prompted systematic revision of stromatolites in the Aralka Formation and analysis of their distribution. The stromatolites include a new Group and Form, Atilanya fennensis, which has a distincti...

New stromatolite taxa are described from the Glengarry Group, Glengarry Basin (formerly part of the Nabberu Basin), Western Australia, as part of ongoing biostratigraphic studies of Proterozoic sequences in Western Australia. A new group and form, Wilunella glengarrica is proposed, and two new forms, Kussoidella karalundienis and Segosia finlaysoniensis are circumscribed. In addition, three other forms, represented only by poorly preserved specimens and as yet insufficiently known for formal taxonomic designation, are briefly described. The assemblage differs from that of the overlying Earaheedy Group, and can be used to distinguish basal Glengarry Group sequences from outliers of the lithologically similar basal Earaheedy Group. The Glengarry Group taxa have not been reported outside the Glengarry Basin, and are therefore of little use at present for inter-regional correlation. However, the ranges of the previously described groups Kussoidella and Segosia are consistent with the probable 1·8 Ga or older ...

Two new stromatolites, Ephyaltes edingunnensis and Eucapsiphora leakensis, are described from the Palaeoproterozic Earaheedy Group, in the Earaheedy Basin (formerly the eastern part of the Nabberu Basin), Western Australia. In addition, new localities are reported for Asperia digitata comb. nov. (= Yelma digitata Grey 1984), Pilbaria deverella Grey 1984, and Yandilla meekatharrensis Grey 1984 from problematic successions in the adjacent Glengarry Basin (formerly the western part of the Nabberu Basin), confirming correlation of these rocks with the base of the Earaheedy Group. Four of the five groups recorded, Asperia, Eucapsiphora, Ephyaltes and Pilbaria, are known from outside the Earaheedy Basin and their stratigraphic age is consistent with the probable minimum 1.65 Ga age of the Earaheedy Group. However, none of the forms has yet been recorded from outside the Earaheedy Group.