Charcoalified Agathoxylon-type wood with preserved secondary phloem from the lower Permian of the Brazilian Parana Basin

Degani-Schmidt, Isabela; Guerra-Sommer, Margót

doi:10.1016/j.revpalbo.2015.12.003

Cited by 14 publications

(5 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(), fig. , with the additional data published after (Degani‐Schmidt et al ., ; Mahesh et al ., ; Manfroi et al ., ; Slater et al ., ; Tewari et al ., ; Costa et al ., ; Degani‐Schmidt and Guerra‐Sommer, ; Jasper et al ., ; Kauffmann et al ., ). Late Permian palaeogeographic reconstruction from Ziegler et al .…”

Section: Introductionmentioning

confidence: 97%

Fires in the mire: repeated fire events in Early Permian ‘peat forming’ vegetation of India

Jasper

Agnihotri²,

Tewari³

et al. 2016

Geological Journal

View full text Add to dashboard Cite

Macro‐charcoal, as direct evidence of palaeo‐wildfires, is a common constituent throughout an Early Permian (Cisuralian) inertinite‐rich coal seam from the Dhanpuri Coal Mine (Barakar Formation, Sohagpur Coalfield, Madhya Pradesh, India). The continuous presence of macro‐charcoal within this particular seam demonstrates that fires occurred repeatedly in the source vegetation of the seam. Based on these macro‐charcoal remains, an anatomical assessment of the diversity and taxonomic composition of the vegetation, which experienced wildfires and contributed to the formation of peat/coal, is provided. The vegetation that experienced regular fires was dominated by gymnosperms, with a minor component of pteridophytes. The results also support previous studies, which suggest a pyrogenic origin for the high inertinite contents of many Permian coals within Gondwana. Copyright © 2016 John Wiley & Sons, Ltd.

show abstract

Section: Introductionmentioning

confidence: 97%

Fires in the mire: repeated fire events in Early Permian ‘peat forming’ vegetation of India

Jasper

Agnihotri²,

Tewari³

et al. 2016

Geological Journal

View full text Add to dashboard Cite

show abstract

“…It has been suggested that several Paleozoic and Mesozoic plant groups may have an Agathoxylon type of wood: seed ferns, cordaitaleans, and araucarian and cheirolepid conifers (Philippe et al, 2004; Taylor et al, 2009; Degani-Schmidt and Guerra-Sommer, 2016). Besides the fact that Glossopteridales and Cordaitales became extinct at the Permian–Triassic boundary (see Bodnar et al, 2021), the new species show dissimilarities with the wood anatomy of these Paleozoic lineages.…”

Section: Discussionmentioning

confidence: 99%

Araucariaceous fossil woods from the Upper Triassic Ischigualasto Formation (San Juan Province, Argentina): paleofloristic and paleoclimatic implications

et al. 2022

View full text Add to dashboard Cite

In this contribution, fossil woods from the Valle de La Luna Member of the Upper Triassic Ischigualasto Formation at Ischigualasto Provincial Park, San Juan Province, Argentina, are described. The specimens are preserved as silica permineralization in tuffs intercalated with carbonaceous mudstone beds interpreted as distal floodplain facies. The fossil woods were assigned to the new species Agathoxylon argentinum since their anatomy differs from the known Mesozoic Gondwanan species of the genus Agathoxylon. The combination of characters present in the new taxon indicates an affiliation with the conifer family Araucariaceae. Signals of fungal-mediated wood decay were observed, comparable to the activity of basidiomycetes. Spherical structures attached to the walls of the tracheids were recognized and are interpreted as holocarpic chytrid fungi. The growth rings were quantitatively analyzed. Low values of percentage diminution, percentage latewood, and Ring Markedness Index, and a mean percentage skew of +11.5, were obtained, suggesting that the new species was an evergreen gymnosperm. The stratigraphic distribution and taxonomic composition of the Ischigualasto Formation fossil-plant-bearing levels were studied. A vegetation change is recorded in the fossil level bearing Agathoxylon argentinum n. sp., marked by the replacement of the corystosperm genera and a diminution of arboreal corystosperms. This floristic change, in addition to other evidence, indicates humid paleoclimatic conditions for the uppermost part of the Valle de La Luna Member of the Ischigualasto Formation.

show abstract

“…This taxonomical definition is more reliable for wood type 2 and 3 as both have araucarioid cross-field pitting, which is a typical anatomical pattern of Agathoxylon fossil wood secondary xylem [ 75 , 76 , 77 ]. This wood anatomical pattern is widespread in Late Palaeozoic and Mesozoic deposits of different geographical regions of the both hemispheres [ 5 , 73 , 77 , 78 , 79 , 80 ]. It is related to several gymnosperm groups such as Cycadales, Caytoniales, Glossopteridales, Cordaitales, Voltziales, Ullmanniales, Cheirolepidiaceae and Araucariaceae [ 81 , 82 ].…”

Section: Discussionmentioning

confidence: 99%

Recurrent palaeo-wildfires in a Cisuralian coal seam: A palaeobotanical view on high-inertinite coals from the Lower Permian of the Paraná Basin, Brazil

et al. 2019

View full text Add to dashboard Cite

Distribution and abundance of charcoal in coal seams (in form of pyrogenic macerals of the inertinites group) have been considered as a reliable tool to interpret the local and regional palaeo-wildfire regimes in peat-forming depositional environments. Although the occurrence of inertinites is globally well documented for the Late Palaeozoic, the description of palaeobotanical evidence concerning the source plants of such charcoal is so far largely missing. In the present study, we provide the first detailed analysis of macro-charcoal preserved in the Barro Branco coal seam, Rio Bonito Formation, Cisuralian of the Paraná Basin, Santa Catarina State, Brazil. Charcoal, in form of macro-charcoal and inertinites, was documented in all the six coal-bearing strata that compose the succession, confirming the occurrence of recurrent palaeo-wildfires during its deposition. Reflectance values indicated a mean charring temperature reaching ~515°C (and up to 1,045°C in excess) and the macro-charcoal exhibits anatomical features of secondary xylem of Agathoxylon. Combination of results derived from palaeobotanical and petrological data demonstrates that gymnosperm-dominated vegetation was repeatedly submitted to fire events and reinforced the hypothesis that Gondwanan mires were high-fire systems during the Cisuralian.

show abstract

Charcoalified Agathoxylon-type wood with preserved secondary phloem from the lower Permian of the Brazilian Parana Basin

Cited by 14 publications

References 37 publications

Fires in the mire: repeated fire events in Early Permian ‘peat forming’ vegetation of India

Fires in the mire: repeated fire events in Early Permian ‘peat forming’ vegetation of India

Araucariaceous fossil woods from the Upper Triassic Ischigualasto Formation (San Juan Province, Argentina): paleofloristic and paleoclimatic implications

Recurrent palaeo-wildfires in a Cisuralian coal seam: A palaeobotanical view on high-inertinite coals from the Lower Permian of the Paraná Basin, Brazil

Contact Info

Product

Resources

About