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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Linking rivers to the rock record: Channel patterns and paleocurrent circular variance

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Author(s):
Galeazzi, C. P. [1, 2] ; Almeida, R. P. [1] ; do Prado, A. H. [1, 3]
Total Authors: 3
Affiliation:
[1] Univ Sao Paulo, Inst Geociencias, Rua Lago 562, BR-05508900 Sao Paulo, SP - Brazil
[2] Seoul Natl Univ, Sch Earth & Environm Sci, Seoul 08826 - South Korea
[3] Univ Bern, Inst Geol Sci, CH-3012 Bern - Switzerland
Total Affiliations: 3
Document type: Journal article
Source: GEOLOGY; v. 49, n. 11, p. 1402-1407, NOV 1 2021.
Web of Science Citations: 0
Abstract

Alluvial rivers are the most important agents of sediment transport in continental basins, whose fluvial deposits enclose information related to the time when rivers were active. In order to extract the most information from fluvial deposits in the sedimentary record, it is imperative to quantify the natural variability of channel patterns at the global scale, explore what controls may influence their development, and investigate whether channel pattern information is preserved in the alluvial plains in order to develop tools for recognizing them in the sedimentary record. By surveying 361 reaches of modern alluvial rivers with available water discharge data at a global scale, we present a quantitative channel pattern classification based on sinuosity and channel count index applicable to the recognition in the rock record. A continuum of channel patterns ranging from high-sinuosity single channel to lowsinuosity multichannels is documented, along with the proportion of depositional elements in their alluvial plains and their conditions of occurrence. Preserved barforms in the alluvial plains of these rivers are used to infer and quantify paleoflow directions at the channel-belt scale and result in ranges of paleocurrent circular variance that may lead to channel pattern identification in the rock record. Data from this work indicate that the recognition of channel patterns may be used to predict paleogeographic features such as the scale of drainage basin area and discharge, slope, and annual discharge regimes. (AU)

FAPESP's process: 18/23899-2 - Trans-Amazon Drilling Project: origin and evolution of the forests, climate, and hydrology of the South American tropics
Grantee:André Oliveira Sawakuchi
Support Opportunities: Research Program on Global Climate Change - Thematic Grants
FAPESP's process: 16/03091-5 - CHARACTERIZATION OF HETEROGENEITIES AND MODELING OF RESERVOIR ANALOGUES IN FLUVIAL AND EOLIAN DEPOSITS
Grantee:Liliane Janikian Paes de Almeida
Support Opportunities: Regular Research Grants
FAPESP's process: 18/02197-0 - Integrated quantitative models for quaternary fluvial sedimentation and the distribution of the varzea and terra firme biomes in Western and central Amazonia
Grantee:Ariel Henrique Do Prado
Support Opportunities: Scholarships in Brazil - Master
FAPESP's process: 17/06874-3 - Fluvial dynamics and sedimentary deposits in the Amazon channel: providing tools to decipher the paleogeographical evolution of Amazonia and deposits of large anabranching rivers in the rock record
Grantee:Cristiano Padalino Galeazzi
Support Opportunities: Scholarships in Brazil - Doctorate