Late Quaternary fluvial terrace evolution in the main southern Amazonian tributary

Auteur(s) et Affiliation(s)

ROSSETTI, D.F.

Inst. Nacional de Pesquisas Espaciais, São José dos Campos, Bresil

COHEN, M.C.L.

Univ. Federal do Pará, Centro de Geociências, Belém, Bresil

BERTANI, T.C.

Inst. Nacional de Pesquisas Espaciais, São José dos Campos, Bresil

HAYAKAWA, E.H.

Univ. Federal de Alfenas, Inst. de Ciências da Natureza (ICN), Alfenas, Bresil

PAZ, J.D.S.

Univ. Federal do Mato Grosso, Inst. de Ciências Exatas e da Terra, Cuiabá, Bresil

CASTRO, D.F.

Inst. Nacional de Pesquisas Espaciais, São José dos Campos, Bresil

FRIAES, Y.

Univ. Federal do Pará, Centro de Geociências, Belém, Bresil

Description :
This work investigates the late Quaternary evolution of the Madeira River, the biggest southern tributary of the Amazonas Basin and a major waterway in South America, with the goal of discussing the factor with highest potential of influence on its development in space and time. The approach consisted of carrying out a detailed morphological, sedimentological and chronological characterization of terrace deposits. These terraces are the testimony of successive downcutting and sediment aggradation. Episodes of terrace erosion and deposition cannot be fully accommodated within the framework of fluctuating river base level tied to Late Pleistocene – Holocene global or regional climate fluctuations. Changes in tectonic subsidence rates might have played an important role in the equilibrium state of this particular fluvial system.

Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2014, vol. 116, p. 19-37, nombre de pages : 19, Références bibliographiques : 1 p.

Date :
2014

Editeur :
Pays édition : Allemagne, Cremlingen-Destedt, Catena

Langue :
Anglais