干旱区生态环境知识资源中心(Arid): PALEOCLIMATIC INFERENCES BASED ON WOOD GROWTH INTERRUPTIONS IN LATE TRIASSIC FLOOD DEPOSITS FROM THE SOUTHERNMOST BRAZILIAN GONDWANA

Arid

DOI	10.4072/rbp.2021.1.01
	PALEOCLIMATIC INFERENCES BASED ON WOOD GROWTH INTERRUPTIONS IN LATE TRIASSIC FLOOD DEPOSITS FROM THE SOUTHERNMOST BRAZILIAN GONDWANA
	Siegloch, Anelise Marta; Guerra-Sommer, Margot; Schultz, Cesar Leandro; Barboza, Eduardo Guimaraes
通讯作者	Siegloch, AM (corresponding author), Univ Fed Rio Grande do Sul, Programa Posgrad Geociencias, IGEO, Av Bento Goncalves 9500, BR-91509900 Porto Alegre, RS, Brazil.
来源期刊	REVISTA BRASILEIRA DE PALEONTOLOGIA
ISSN	1519-7530
EISSN	2236-1715
出版年	2021
卷号	24 期号:1 页码:3-20
英文摘要	The goals of this study were to establish patterns in a silicified wood assemblage to depict the evolution patterns of the Triassic paleoclimate in southern Brazilian Gondwana during an interval of global arid to semi-arid climatic context, and the taphonomic process that led to the preservation of the so-called Petrified Forest, which is preserved in the central area of the state of Rio Grande do Sul. Analyses were developed with an assemblage of 13 permineralized conifer wood, using standard thin sections, whose anatomical details were studied in transmitted light. Ground-Penetrating Radar was used to obtain information about the depositional characteristics of the site. Main results are: true growth rings are absent in all samples, and the boundaries of the interruption zones are marked by an abrupt decline in cell diameter, but they are not accompanied by a reduction of cell wall thickness. The subsequent reversion to normal tracheid diameter is also abrupt, revealing the return of the previous growing conditions. Ground-penetrating Radar analyses confirmed that the Mata Sequence deposits correspond to a river. The identification of growth interruption zones in a Late Triassic wood assemblage in southernmost Brazilian Gondwana (Paleobotanic Garden of the city of Mata, RS) indicates the presence of tropical, temporarily dry climate conditions, characterized by irregular, short-term environmental disturbances to growth. The taphonomic process was related to a river-channel infilling depositional process, under the influence of high-energy flood events that dragged and buried the trees.
英文关键词	Wood growth patterns Mata sequence gymnosperms Triassic climate petrified forest
类型	Article
语种	英语
开放获取类型	Green Submitted, hybrid
收录类别	SCI-E
WOS记录号	WOS:000614261900001
WOS关键词	GROUND-PENETRATING RADAR ; GRANDE-DO-SUL ; PARANA BASIN ; CONIFER WOODS ; STRATA ; FUNGI
WOS类目	Paleontology
WOS研究方向	Paleontology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/367747
作者单位	[Siegloch, Anelise Marta; Guerra-Sommer, Margot; Schultz, Cesar Leandro; Barboza, Eduardo Guimaraes] Univ Fed Rio Grande do Sul, Programa Posgrad Geociencias, IGEO, Av Bento Goncalves 9500, BR-91509900 Porto Alegre, RS, Brazil
推荐引用方式 GB/T 7714	Siegloch, Anelise Marta,Guerra-Sommer, Margot,Schultz, Cesar Leandro,et al. PALEOCLIMATIC INFERENCES BASED ON WOOD GROWTH INTERRUPTIONS IN LATE TRIASSIC FLOOD DEPOSITS FROM THE SOUTHERNMOST BRAZILIAN GONDWANA[J],2021,24(1):3-20.
APA	Siegloch, Anelise Marta,Guerra-Sommer, Margot,Schultz, Cesar Leandro,&Barboza, Eduardo Guimaraes.(2021).PALEOCLIMATIC INFERENCES BASED ON WOOD GROWTH INTERRUPTIONS IN LATE TRIASSIC FLOOD DEPOSITS FROM THE SOUTHERNMOST BRAZILIAN GONDWANA.REVISTA BRASILEIRA DE PALEONTOLOGIA,24(1),3-20.
MLA	Siegloch, Anelise Marta,et al."PALEOCLIMATIC INFERENCES BASED ON WOOD GROWTH INTERRUPTIONS IN LATE TRIASSIC FLOOD DEPOSITS FROM THE SOUTHERNMOST BRAZILIAN GONDWANA".REVISTA BRASILEIRA DE PALEONTOLOGIA 24.1(2021):3-20.