干旱区生态环境知识资源中心(Arid): The sedimentary record of wet and dry eolian systems in the Cretaceous of Southeast Brazil: stratigraphic and paleogeographic significance

Arid

DOI	10.1590/2317-4889201920190057
	The sedimentary record of wet and dry eolian systems in the Cretaceous of Southeast Brazil: stratigraphic and paleogeographic significance
	Mescolotti, Patricia Colombo; Varejao, Filipe Giovanini; Warren, Lucas Verissimo; Bernardes Ladeira, Francisco Sergio; Fonseca Giannini, Paulo Cesar; Assine, Mario Luis
通讯作者	Mescolotti, PC (corresponding author), Univ Estadual Paulista, Inst Geociencias & Ciencias Exatas, Rio Claro, SP, Brazil.
来源期刊	BRAZILIAN JOURNAL OF GEOLOGY
ISSN	2317-4889
EISSN	2317-4692
出版年	2019
卷号	49 期号:3
英文摘要	Sedimentologic and stratigraphic studies of paleo-deserts from the Brazilian Cretaceous are of great potential to understand the paleoclimate and paleogeography of Gondwana during its final rifting stage. Herein, we describe and discuss two depositional units characterized by two distinct eolian systems that are bounded by a long-lived unconformity. The Lower Unit (Barremian/Aptian) encompasses a wet eolian system composed of dune, interdunes, and ephemeral alluvial deposits. A continuous paleosol horizon in the upper part of the Lower Unit records dune stabilization and end of eolian accumulation, in a period of climate amelioration possibly in the late Aptian. The stratigraphic gap proposed for the unconformity (Cenomanian to Coniacian) coincides with the Cretaceous Thermal Maximum. The Upper Unit (Santonian?/ Campanian) comprises dune fields of a dry eolian system capped by the Mata da Corda volcanic rocks. Cross stratification dip directions from both eolian systems shows transport towards SSW. Paleo-winds coming from the northeast quadrant reveal that the continental breakup and drifting had little influence on the surface winds in this Gondwana sector. The Upper Cretaceous paleo-winds are coherent with global paleo-circulation models, based on a high-pressure cell over the South Atlantic proto-ocean, favoring desertification in the inner portion of the southwestern Gondwana.
英文关键词	Areado Group Eolian systems Cretaceous paleo-winds Sanfranciscana Basin
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000498951000001
WOS关键词	FLUVIAL-AEOLIAN INTERACTIONS ; SEQUENCE STRATIGRAPHY ; NEUQUEN BASIN ; FACIES ARCHITECTURE ; SANDSTONE FORMATION ; BOTUCATU FORMATIONS ; INTERDUNE DEPOSITS ; BOUNDING SURFACES ; GUARA FORMATION ; CLIMATE
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/369903
作者单位	[Mescolotti, Patricia Colombo; Varejao, Filipe Giovanini; Warren, Lucas Verissimo; Assine, Mario Luis] Univ Estadual Paulista, Inst Geociencias & Ciencias Exatas, Rio Claro, SP, Brazil; [Bernardes Ladeira, Francisco Sergio] Univ Estadual Campinas, Inst Geociencias, Campinas, SP, Brazil; [Fonseca Giannini, Paulo Cesar] Univ Sao Paulo, Inst Geociencias, Sao Paulo, SP, Brazil
推荐引用方式 GB/T 7714	Mescolotti, Patricia Colombo,Varejao, Filipe Giovanini,Warren, Lucas Verissimo,et al. The sedimentary record of wet and dry eolian systems in the Cretaceous of Southeast Brazil: stratigraphic and paleogeographic significance[J],2019,49(3).
APA	Mescolotti, Patricia Colombo,Varejao, Filipe Giovanini,Warren, Lucas Verissimo,Bernardes Ladeira, Francisco Sergio,Fonseca Giannini, Paulo Cesar,&Assine, Mario Luis.(2019).The sedimentary record of wet and dry eolian systems in the Cretaceous of Southeast Brazil: stratigraphic and paleogeographic significance.BRAZILIAN JOURNAL OF GEOLOGY,49(3).
MLA	Mescolotti, Patricia Colombo,et al."The sedimentary record of wet and dry eolian systems in the Cretaceous of Southeast Brazil: stratigraphic and paleogeographic significance".BRAZILIAN JOURNAL OF GEOLOGY 49.3(2019).