Mississippian palynoflora from the northern Perth Basin, Western Australia: systematics and stratigraphical and palaeogeographical significance

Playford, Geoffrey (2015) Mississippian palynoflora from the northern Perth Basin, Western Australia: systematics and stratigraphical and palaeogeographical significance. Journal of Systematic Palaeontology, 14 9: 731-770. doi:10.1080/14772019.2015.1091792


Author Playford, Geoffrey
Title Mississippian palynoflora from the northern Perth Basin, Western Australia: systematics and stratigraphical and palaeogeographical significance
Journal name Journal of Systematic Palaeontology   Check publisher's open access policy
ISSN 1478-0941
1477-2019
Publication date 2015-10-01
Year available 2015
Sub-type Article (original research)
DOI 10.1080/14772019.2015.1091792
Open Access Status Not yet assessed
Volume 14
Issue 9
Start page 731
End page 770
Total pages 40
Place of publication Abingdon, Oxfordshire, United Kingdom
Publisher Taylor & Francis
Collection year 2016
Language eng
Formatted abstract
Core material from an exploratory diamond drillhole (DDH CL5) in the Irwin Terrace, northern Perth Basin, Western Australia, contains a profuse and well-preserved palynofloral assemblage composed almost exclusively of trilete miospores. These comprise at least 32 species, distributed among 23 genera. Two species – Retusotriletes separatus sp. nov. and Apiculiretusispora tersa sp. nov. – are new, and Velamisporites cortaderensis (Césari & Limarino, 1987) is proposed as a new binomial combination. The palynoflora essentially replicates compositionally the Grandispora maculosa Assemblage, first described in 1968 from New South Wales (Italia Road Formation of the Southern New England Orogen) with revised dating of late Visean. Particularly noteworthy in both local and regional biostratigraphical contexts is the combined presence of G. maculosa, Reticulatisporites magnidictyus, Cordylosporites asperidictyus, Foveosporites pellucidus, Indotriradites kuttungensis, I. daemonii, Verrucosisporites aspratilis, V. gregatus, V. quasigobbettii, Raistrickia accinta, R. radiosa, Diatomozonotriletes daedalus and Psomospora detecta. Of these, V. quasigobbettii and I. kuttungensis are predominant. Additionally, the assemblage contains some trilete species reported subsequently (in 1992) from a slightly younger (Pennsylvanian) succession of the Galilee Basin, southern Queensland; e.g. Cyclogranisporites firmus, Verrucosisporites basiliscutis, Dibolisporites disfacies, Diatomozonotriletes birkheadensis, Densoisporites truswelliae (syn. Densoisporites sp. of Jones & Truswell), Grandispora (Spelaeotriletes) queenslandensis and Velamisporites cortaderensis (syn., inter alia, Reticulatisporites bifrons Jones & Truswell). Significantly, however, the CL5 palynoflora is devoid of gymnospermous prepollen (indeed any pollen grains) that have been documented from the Galillee Basin deposits. Many components of the G. maculosa suite have been reported from elsewhere in Gondwana, particularly Brazil and Argentina, attesting to its stratigraphical significance across the supercontinent, and to the widespread dispersal of its pteridophytic parental flora in a relatively narrow time interval, bracketed within the late Visean through early Serpukhovian. The present assemblage, and indeed its representatives elsewhere in Gondwana, was likely deposited in non-marine, fluvial or lacustrine, interglacial environments that preceded the extensive icehouse conditions that prevailed during much of the Pennsylvanian.
Keyword Palynology
Systematics
Biostratigraphy
Palaeogeography
Perth Basin
Mississippian
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Earth Sciences Publications
Official 2016 Collection
 
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