Arid
DOI10.1016/j.revpalbo.2012.11.001
The palynology of the Sonsela member (Late Triassic, Norian) at Petrified Forest National Park, Arizona, USA
Reichgelt, Tammo1; Parker, William G.2,3; Martz, Jeffrey W.2; Conran, John G.4; van Konijnenburg-van Cittert, Johanna H. A.1; Kurschner, Wolfram M.5
通讯作者Reichgelt, Tammo
来源期刊REVIEW OF PALAEOBOTANY AND PALYNOLOGY
ISSN0034-6667
EISSN1879-0615
出版年2013
卷号189页码:18-28
英文摘要

Recent paleontological investigations and lithostratigraphic revisions reveal a marked biotic turnover zone within the continental deposits of the Sonsela member of the Chinle Formation (Late Triassic, Norian) at Petrified Forest National Park, USA.


Within the Sonsela member we found three pollen assemblage biozones: Zone II (90.5-94 m above the Mesa Redondo member) contains a relatively diverse palynological assemblage, with a mix of pteridosperms, voltzialean and some Mesozoic conifers. Following a 2.3 m hiatus, Zone IIIa (96-97.5 m) is characterized by a decrease in pteridosperms and Mesozoic conifers and a drop in voltzialean conifer diversity. The alleged voltzialean conifer pollen Klausipollenites gouldii was dominant in this part of the assemblage and a significant rise in spores and cycad pollen was also evident. In Zone IIIb (97.5-98.5 m) diversity increases and several taxa, which were absent in Zone Ilia reappear, although K. gouldii remained the most abundant taxon. The transition between the palynological assemblages Zones II and Ilia coincide approximately (within a similar to 2.5 m interval) with a documented faunal turnover.


The floristic assemblages suggest that the climate of the south-western United States during the Norian was most likely semi-arid and highly seasonal, despite being located at tropical latitudes, with acidification occurring towards the end-Triassic as the continent drifted northwards and global volcanism increased. The gymnosperm-dominated palynofloral assemblage as opposed to the fern- and horsetail-dominated macrofossil record of the Sonsela member of the Chinle Formation, conforms to a semi-arid upland environment alternated by riparian, swampy lowland. (C) 2012 Elsevier B.V. All rights reserved.


英文关键词Late Triassic Norian Petrified Forest National Park Palynology Palynoflora Chinle Formation
类型Article
语种英语
国家Netherlands ; USA ; Australia ; Norway
收录类别SCI-E
WOS记录号WOS:000314431200003
WOS关键词CHINLE FORMATION ; CONE ; EVOLUTION ; CONIFER ; STRATA ; POLLEN ; ULTRASTRUCTURE ; MORPHOLOGY ; MIDDLE ; SCALE
WOS类目Plant Sciences ; Paleontology
WOS研究方向Plant Sciences ; Paleontology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/179773
作者单位1.Univ Utrecht, Palaeobot & Palynol Lab, NL-3584 CD Utrecht, Netherlands;
2.Petrified Forest Natl Pk, Div Resource Management, Petrified Forest, AZ 86028 USA;
3.Univ Texas Austin, Jackson Sch Geosci, Austin, TX 78712 USA;
4.Univ Adelaide, Sch Earth & Environm Sci, Australian Ctr Evolutionary Biol & Biodivers, Adelaide, SA 5005, Australia;
5.Univ Oslo, Dept Geosci, N-0316 Oslo, Norway
推荐引用方式
GB/T 7714
Reichgelt, Tammo,Parker, William G.,Martz, Jeffrey W.,et al. The palynology of the Sonsela member (Late Triassic, Norian) at Petrified Forest National Park, Arizona, USA[J],2013,189:18-28.
APA Reichgelt, Tammo,Parker, William G.,Martz, Jeffrey W.,Conran, John G.,van Konijnenburg-van Cittert, Johanna H. A.,&Kurschner, Wolfram M..(2013).The palynology of the Sonsela member (Late Triassic, Norian) at Petrified Forest National Park, Arizona, USA.REVIEW OF PALAEOBOTANY AND PALYNOLOGY,189,18-28.
MLA Reichgelt, Tammo,et al."The palynology of the Sonsela member (Late Triassic, Norian) at Petrified Forest National Park, Arizona, USA".REVIEW OF PALAEOBOTANY AND PALYNOLOGY 189(2013):18-28.
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