Lower Permian (Sakmarian) Palynoflora From the Woolaga Limestone Member of the Holmwood Shale, Northern Perth Basin, Western Australia
Open Access
- 20 September 2021
- journal article
- Published by Royal Society of Western Australia in Journal of The Royal Society of Western Australia
- Vol. 104, 45-63
Abstract
The Woolaga Limestone Member—a thin, muddy, calcareous unit of the Holmwood Shale in the northern Perth Basin of Western Australia—contains a diverse and exceptionally well preserved palynoflora associated with a varied marine invertebrate fauna indicative of a Sakmarian (Early Permian/Cisuralian) age. Spores and pollen grains are overwhelmingly predominant in this palynomorph assemblage, with the identified taxa suggesting its assignment to either the Converrucosisporites confluens Zone or the succeeding Pseudoreticulatispora pseudoreticulata Zone of the currently recognized Western Australian Permian palynozonation. The spore-pollen content reveals substantial allochthonous contributions from the pteridophytic and gymnospermous (notably glossopterid) land vegetation into the marine depositional environment. Autochthonous or near-autochthonous components consist of algal microfossils (marine, fresh water, or brackish water) and rare scolecodonts (wholly marine).Keywords
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