Gênese de horizontes Bt da Formação Marília (Cretáceo Superior)

Góes, Liliane Matos

doi:10.47749/t/unicamp.2019.1088103

Cited by 2 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In total, the absolute dating of 114 Optically Stimulated Luminescence (OSL) surface cover samples associated with low river terraces were employed in the present study. In detail, all data collected from 30 rivers were obtained by the Environmental Analysis and Territorial Dynamics of the Laboratory of Geomorphology and Environmental Analysis IG-UNICAMP [27,34,36,37,41,42,44,[66][67][68][69][70][71][72][73].…”

Section: Selection and Spatialization Of Geochronological Datamentioning

confidence: 99%

“…Regarding the southern coast of Brazil, we used data from the surficial covers of low terraces located on coastal plains associated with the mouth of the Araranguá (see box G) [36,76] and Itapocu (see box G) [73] rivers. Within the scope of the continental morphological compartments of Northeast Brazil, absolute ages correspond to surficial covers associated with low terraces located at the middle course of the Itapicuru (see box C of Figure 1) [42,69,72] and Grande (see box B) rivers, both in the Southern Sertaneja Depression. Meanwhile, the areas analyzed in Southeast Brazil are associated with the Paulista Peripheral Depression [27,34,37], the Paulista Western Plateau [34,68], and the Uberlândia-Uberaba plateau on the edge of the Brazilian Central Plateau [70].…”

Section: Selection and Spatialization Of Geochronological Datamentioning

confidence: 99%

“…Dots correspond to ages obtained by OSL dating for materials from low river terraces (Supplementary Materials). Red dots represent ages obtained by OSL dating in the materials from low river terraces corresponding to the samples from the Southern Sertaneja Depression of Northeastern Brazil [69,72]. Horizontal bars indicate the standard deviation of dating.…”

Section: Southern Sertaneja Depression Of Northeastern Brazilmentioning

confidence: 99%

See 2 more Smart Citations

Genesis and Distribution of Low Fluvial Terraces Formed by Holocene Climate Pulses in Brazil

Filho

Moreira

Lämmle

et al. 2022

Water

View full text Add to dashboard Cite

Low fluvial terraces present azonal spatialization, encompassing several geomorphological compartments and climate zones in Brazil. Their genesis is directly related to river dynamics. When influenced by allogenic forces, such as Holocene climate pulses, it results in channel incision and posterior abandonment of the floodplain. Relatively plain landforms at different altimetric levels identified between the current floodplain and hillslope (low river terraces) are a result of these processes. Previous works using Optically Stimulated Luminescence (OSL) in low terraces of several rivers in Brazil have indicated morpho-chronologic similarities between depositional events, raising the hypothesis of feedbacks and fluvial adjustments relatively simultaneous to Holocene climate events. Considering these dynamics, this study employed OSL to obtain absolute dating information for 114 samples taken from distinct levels of the low river terraces of 30 rivers in Brazil, integrating the database of the IG-UNICAMP laboratory of Geomorphology and Environmental Analysis. Based on the data and statistical analysis (cluster and correlation analysis), this study aimed to identify relationships between different variables which might have controlled spatial homogenous and heterogeneous feedbacks during distinct paleoenvironmental contexts. The proposed methodology tested a fundamental hypothesis of the regional climatic geomorphology, and the results obtained may contribute to future discussions on the relationship between low river terraces and anthropic occupation.

show abstract

Section: Selection and Spatialization Of Geochronological Datamentioning

confidence: 99%

Section: Selection and Spatialization Of Geochronological Datamentioning

confidence: 99%

Section: Southern Sertaneja Depression Of Northeastern Brazilmentioning

confidence: 99%

See 1 more Smart Citation

Genesis and Distribution of Low Fluvial Terraces Formed by Holocene Climate Pulses in Brazil

Filho

Moreira

Lämmle

et al. 2022

Water

View full text Add to dashboard Cite

show abstract

“…e frias entre 21.400 e 7.300 anos AP em Águas Emendadas (DF); e Ferraz-Vincentini &Salgado-Laboriau (1996) inferiram condições áridas e relativamente mais quentes no período entre 10.500 e 7.700 anos AP em Cromínea (GO). de 6.100 anos AP é indicado como um período mais seco(Góes, 2019).…”

unclassified

Reconstituição Paleoambiental Da Bacia Do Rio Grande (Ba), Por Meio Da Análise De Fitólitos E Luminescência Opticamente Estimulada (Loe)

et al. 2023

View full text Add to dashboard Cite

A Bacia Hidrográfica do Rio Grande (BRG) localiza-se no oeste do Estado da Bahia, sendo caracterizada principalmente pelo contraste altimétrico de cuestas e áreas de topografia suave, como também por se configurar como uma área de transição entre os biomas Cerrado e Caatinga. Este trabalho tem como objetivo compreender a dinâmica e transformação da paisagem no médio curso da BRG durante o Quaternário, tendo como base a investigação de coberturas superficiais de terraços fluviais, inferindo variações da vegetação e dos processos geomorfológicos associados a episódios de pulsações climáticas. A metodologia consistiu numa análise integrada envolvendo fitólitos; análises granulométricas e cronologia por datações por Luminescência Opticamente Estimulada. Não foram registradas grandes mudanças na cobertura vegetal para a BRG no Holoceno, com predomínio de vegetação aberta com pontual ocorrência de remanescentes florestais. No entanto, foi possível observar pequenas variações que identificaram períodos relativamente mais secos no Pleistoceno Superior e no Holoceno Médio, mais úmidos por volta de 1.430 anos AP, e variações de umidade nos últimos 420 anos.

show abstract

Gênese de horizontes Bt da Formação Marília (Cretáceo Superior)

Cited by 2 publications

References 0 publications

Genesis and Distribution of Low Fluvial Terraces Formed by Holocene Climate Pulses in Brazil

Genesis and Distribution of Low Fluvial Terraces Formed by Holocene Climate Pulses in Brazil

Reconstituição Paleoambiental Da Bacia Do Rio Grande (Ba), Por Meio Da Análise De Fitólitos E Luminescência Opticamente Estimulada (Loe)

Contact Info

Product

Resources

About