A Mississippian Miospore Biozone for Southern Gondwana

Loinaze, Valeria Pérez

doi:10.2113/gspalynol.31.1.101

Cited by 33 publications

(8 citation statements)

References 42 publications

(41 reference statements)

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“…For the Mississippian of South America, Caputo et al (2008) put forward a framework with two distinct glacial intervals, one in the middle Tournaisian and the other in the middle Visean. A mid-Visean glaciation has already been confirmed in western Argentina after diamictites from the top of the Cortaderas Formation were biostratigraphically constrained (Perez Loinaze, 2007;Perez Loinaze et al, 2010), and glacial deposits from the Punta del Agua Formation (Baez et al, 2014) have been radiometrically dated at 335.9 ±0.06 Ma (Gulbranson et al, 2010). However, this glaciation has…”

Section: The Hierarchical Structure Of Mississippian Climatic Variability In Western Argentinamentioning

confidence: 95%

Glaciomarine sequence stratigraphy in the Mississippian Río Blanco Basin, Argentina, southwestern Gondwana. Basin analysis and palaeoclimatic implications for the Late Paleozoic Ice Age during the Tournaisian.

Ezpeleta

Rustán

Balseiro

et al. 2020

JGS

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The Late Paleozoic Ice Age (LPIA) has been well recorded in the uppermost Mississippian–Pennsylvanian of Gondwana. Nevertheless, little is known about the temporal and geographic dynamics, particularly during the early Mississippian. We report on exceptional Tournaisian glaciomarine stratigraphic sections from central Argentina (Río Blanco Basin). Encompassing c. 1400 m, these successions contain conspicuous glacigenic strata with age constraints provided by palaeontological data and U/Pb detrital zircon age spectra. A variety of marine, glaciomarine and fan-deltaic environments indicate relative sea-level variations mainly associated with tectonism and repetitive cycles of glacial activity. Provenance analysis indicates a source from the Sierras Pampeanas basement located to the east. Fifteen sequences were grouped into three depositional models: (1) Transgressive Systems Tracts (TST) to Highstand Systems Tracts (HST) sequences unaffected by glacial ice; (2) Lowstand Systems Tracts (LST) to TST and then to HST with glacial inﬂuence; and (3) non-glacial Falling-Stage Systems Tracts (FSST) to TST and HST. The glacial evidence indicates that the oldest Mississippian glacial stage of the LPIA in southwestern Gondwana is constrained to the middle Tournaisian. In contrast with previous descriptions of Gondwanan coeval glacial records, our sequence analysis confirms complex hierarchical climate variability, rather than a single episode of ice advance and retreat.Supplementary material: Detailed stratigraphic sections, palaeocurrents and compositional analysis and U/Pb detrital Zr methodology and data are available at: https://doi.org/10.6084/m9.figshare.c.5011424

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Section: The Hierarchical Structure Of Mississippian Climatic Variability In Western Argentinamentioning

confidence: 95%

Glaciomarine sequence stratigraphy in the Mississippian Río Blanco Basin, Argentina, southwestern Gondwana. Basin analysis and palaeoclimatic implications for the Late Paleozoic Ice Age during the Tournaisian.

Ezpeleta

Rustán

Balseiro

et al. 2020

JGS

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“…From Anapiculatisporites largus zonal deposits of the Bonaparte Basin, northwestern Australia (Playford & Satterthwait, 1986) and late Mississippian strata of Argentina (Perez Loinaze, 2007).…”

Section: Previous Recordsmentioning

confidence: 99%

“…A notable absentee in the Lyall palynoflora is Reticulatisporites magnidictyus, also Grandispora maculosa and Verrucosisporites pseudogobbettii, which are indices in Australia of the G. maculosa Zone and are there unrecorded from the immediately preceding Anapiculatisporites largus Zone. Reticulatisporites magnidictyus is extensively distributed through Eastern, Western, and Northern Gondwana (q.v., Playford, 2017: 215-216;Perez Loinaze & Césari, 2012) and first appears at the base of the eponymous Mag zone in Brazil (Melo & Loboziak, 2003) and of the equivalent MQ (magnidictyus-quasigobbettii) Zone in the Río Blanco Basin, Argentina (Perez Loinaze, 2007).…”

Section: Extra-australian Correlationmentioning

confidence: 99%

Mississippian Palynoflora from the Clarke River Basin, North Queensland, Australia

Playford

2022

Ameghiniana

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The diverse, well-preserved spore assemblage hosted by the non-marine Lyall Formation of the Clarke River Basin in north Queensland includes many species reported previously from Mississippian strata elsewhere in Australia, together with one new genus and species (Apricasporites cancellosus) and seven additional new species (Granulatisporites commutabilis, Anapiculatisporites radiatus, Camptotriletes inaequabilis, C. suggrandis, Convolutispora inreligata, Foveosporites magnus, and Endosporites circumsaeptus). In terms of the existing palynostratigrahic zonation of Australian Mississippian successions, the palynoflora is clearly attributable to the Visean Anapiculatisporites largus Zone, first recognized in the Bonaparte Basin (northwestern Australia) and well-represented also in the Drummond Basin, east-central Queensland. However, a few constituent species are known as components of the succeeding Grandispora maculosa Zone (mid/late Visean-early Serpukhovian). This study provides confirmation of floristic affinities between Eastern and Western Gondwana during the Mississippian.

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“…6: Bolivia (Fasolo et al 2006; see also Dino & Playford 2002, p. 344, Perez Loinaze 2007Melo & Playford 2012, p. 147). 7: R ıo Blanco, Calingasta-Uspallata, and Paganzo basins, western Argentina (Perez Loinaze 2007, 2008a, 2008b, 2009C esari et al 2011). 8: West Falkland/Isla Gran Malvina (Hyam et al 1997;palaeolocation after Marshall 1994;but cf.…”

Section: Spatiotemporal Distributionmentioning

confidence: 99%

Intraspecific variation and palaeogeographic dispersal of the Mississippian miosporeReticulatisporites magnidictyusPlayford & Helby, 1968

Playford

2017

Palynology

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Renewed study of an Australian Mississippian-age palynoflorathe Grandispora maculosa zonal assemblage from the Mount Johnstone/Italia Road Formation (Hunter Valley, New South Wales)reveals significant morphological variation in some of its key miospore componentsin particular Reticulatisporites magnidictyus, the subject of the present account. Detailed microscopy of numerous topotypic specimens of this species, originally described in 1968, results in its formal emendation; this takes particular account of the hitherto unrecognised presence of a proximo-apical prominence about the confluence of the laesurae. The G. maculosa palynoflora, with its constituent R. magnidictyus, has been reported from within a ca. 30-45 S palaeolatitudinal belt, at numerous Western, Eastern, and Northern Gondwanan locations in strata of middle Visean-early Serpukhovian age, but with a possible extension into the Early Pennsylvanian (Bashkirian). Consequently, R. magnidictyus is one of a very limited group of distinctive miospore species that facilitate long-distance chronostratigraphic correlation within the supercontinent.

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A Mississippian Miospore Biozone for Southern Gondwana

Cited by 33 publications

References 42 publications

Glaciomarine sequence stratigraphy in the Mississippian Río Blanco Basin, Argentina, southwestern Gondwana. Basin analysis and palaeoclimatic implications for the Late Paleozoic Ice Age during the Tournaisian.

Glaciomarine sequence stratigraphy in the Mississippian Río Blanco Basin, Argentina, southwestern Gondwana. Basin analysis and palaeoclimatic implications for the Late Paleozoic Ice Age during the Tournaisian.

Mississippian Palynoflora from the Clarke River Basin, North Queensland, Australia

Intraspecific variation and palaeogeographic dispersal of the Mississippian miosporeReticulatisporites magnidictyusPlayford & Helby, 1968

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