Modern and ancient amalgamated sandy meander‐belt deposits

recognition and controls on development

Adrian J Hartley, Amanda Owen, Gary S. Weissmann, Louis A. Scuderi

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

Amalgamated sandy meander belts and their deposits are common in modern continental and marine‐connected basins yet comprise a minor constituent of the reported fluvial rock record. This suggests that either amalgamated meander‐belts are uncommon in the rock record or that the recognition criteria are lacking to identify sandy meandering river deposits. To address this apparent discrepancy, the authors document the range and occurrence of amalgamated sandy meander belts (ASMB) from modern basins and the stratigraphic record. ASMB are widely distributed throughout both present and rock record sedimentary basins occurring in foreland, extensional, cratonic, strike‐slip and passive margin basins. They occur in all climatic settings ranging from tundra to hot deserts. Three specific occurrences of ASMB are recognised in modern basins: in the proximal to medial parts of distributive fluvial systems (DFS), as laterally‐confined belts that mainly form axial fluvial systems; and as valley‐confined meander belts that may infill bedrock, alluvial or coastal plain valleys. From the limited amount of rock record examples of ASMB that are available, it is clear that they occur in similar settings to those observed in modern basins, the recognition of which provides a framework for the further prediction and identification of ASMB in the rock record. The lack of recognition of ASMB in the rock record is considered to be due to an absence of characteristics that allow clear distinction between sandy meandering and braided fluvial deposits. Characteristics considered common to both include: multi‐storey, laterally extensive (sheet‐like) amalgamated channel belts, dominance of downstream accreting bedforms, no fining upwards grain‐size profile and little or no fine‐grained sediment and/or soil preservation. In contrast, features considered characteristic of meandering rivers such as inclined heterolithic stratification, high palaeocurrent dispersion, single storey channels and fining upwards grain‐size profiles are absent. The authors suggest that no single criterion can be used to definitively identify sandy meander belt deposits in the rock record and that a combination of systematic variations in accretion direction, palaeocurrent dispersal patterns and recognition of storey scale accretion surfaces is necessary to identify clearly this fluvial style. The common occurrence and distribution of sandy meander belts in modern sedimentary basins together with their limited recognition in the rock record suggests that their true stratigraphic distribution has yet to be determined. This has important implications for palaeogeographic reconstructions, understanding the impact of plant colonisation on fluvial planform style and predicting sandstone body dimensions and internal heterogeneity distribution within hydrocarbon reservoirs and aquifers.
Original languageEnglish
Title of host publicationFluvial Meanders and Their Sedimentary Products in the Rock Record
EditorsMassimiliano Ghinassi, Luca Colombera, Nigel P. Mountney , Arnold Jan H. Reesink, Mark Bateman
PublisherInternational Association of Sedimentologists
Pages349-384
Number of pages36
ISBN (Electronic)9781119424437
ISBN (Print)9781119424468
DOIs
Publication statusPublished - 10 Dec 2018

Publication series

NameSpecial Publication- International Association of Sedimentologists
PublisherWiley
ISSN (Print)0141-3600

Fingerprint

meander
rock
basin
sedimentary basin
accretion
hydrocarbon reservoir
alluvial plain
bedform
geological record
passive margin
infill
tundra
river
coastal plain
fluvial deposit
bedrock
stratification
colonization
desert
sandstone

Keywords

  • Meander‐belts
  • rivers
  • planform
  • storey
  • accretion

Cite this

Hartley, A. J., Owen, A., Weissmann, G. S., & Scuderi, L. A. (2018). Modern and ancient amalgamated sandy meander‐belt deposits: recognition and controls on development. In M. Ghinassi, L. Colombera, N. P. Mountney , A. J. H. Reesink, & M. Bateman (Eds.), Fluvial Meanders and Their Sedimentary Products in the Rock Record (pp. 349-384). (Special Publication- International Association of Sedimentologists). International Association of Sedimentologists. https://doi.org/10.1002/9781119424437.ch14

Modern and ancient amalgamated sandy meander‐belt deposits : recognition and controls on development. / Hartley, Adrian J; Owen, Amanda; Weissmann, Gary S.; Scuderi, Louis A.

Fluvial Meanders and Their Sedimentary Products in the Rock Record. ed. / Massimiliano Ghinassi; Luca Colombera; Nigel P. Mountney ; Arnold Jan H. Reesink; Mark Bateman. International Association of Sedimentologists, 2018. p. 349-384 (Special Publication- International Association of Sedimentologists).

Research output: Chapter in Book/Report/Conference proceedingChapter

Hartley, AJ, Owen, A, Weissmann, GS & Scuderi, LA 2018, Modern and ancient amalgamated sandy meander‐belt deposits: recognition and controls on development. in M Ghinassi, L Colombera, NP Mountney , AJH Reesink & M Bateman (eds), Fluvial Meanders and Their Sedimentary Products in the Rock Record. Special Publication- International Association of Sedimentologists, International Association of Sedimentologists, pp. 349-384. https://doi.org/10.1002/9781119424437.ch14
Hartley AJ, Owen A, Weissmann GS, Scuderi LA. Modern and ancient amalgamated sandy meander‐belt deposits: recognition and controls on development. In Ghinassi M, Colombera L, Mountney NP, Reesink AJH, Bateman M, editors, Fluvial Meanders and Their Sedimentary Products in the Rock Record. International Association of Sedimentologists. 2018. p. 349-384. (Special Publication- International Association of Sedimentologists). https://doi.org/10.1002/9781119424437.ch14
Hartley, Adrian J ; Owen, Amanda ; Weissmann, Gary S. ; Scuderi, Louis A. / Modern and ancient amalgamated sandy meander‐belt deposits : recognition and controls on development. Fluvial Meanders and Their Sedimentary Products in the Rock Record. editor / Massimiliano Ghinassi ; Luca Colombera ; Nigel P. Mountney ; Arnold Jan H. Reesink ; Mark Bateman. International Association of Sedimentologists, 2018. pp. 349-384 (Special Publication- International Association of Sedimentologists).
@inbook{1a47a90fa1ba4330934f0aafc24e2a5f,
title = "Modern and ancient amalgamated sandy meander‐belt deposits: recognition and controls on development",
abstract = "Amalgamated sandy meander belts and their deposits are common in modern continental and marine‐connected basins yet comprise a minor constituent of the reported fluvial rock record. This suggests that either amalgamated meander‐belts are uncommon in the rock record or that the recognition criteria are lacking to identify sandy meandering river deposits. To address this apparent discrepancy, the authors document the range and occurrence of amalgamated sandy meander belts (ASMB) from modern basins and the stratigraphic record. ASMB are widely distributed throughout both present and rock record sedimentary basins occurring in foreland, extensional, cratonic, strike‐slip and passive margin basins. They occur in all climatic settings ranging from tundra to hot deserts. Three specific occurrences of ASMB are recognised in modern basins: in the proximal to medial parts of distributive fluvial systems (DFS), as laterally‐confined belts that mainly form axial fluvial systems; and as valley‐confined meander belts that may infill bedrock, alluvial or coastal plain valleys. From the limited amount of rock record examples of ASMB that are available, it is clear that they occur in similar settings to those observed in modern basins, the recognition of which provides a framework for the further prediction and identification of ASMB in the rock record. The lack of recognition of ASMB in the rock record is considered to be due to an absence of characteristics that allow clear distinction between sandy meandering and braided fluvial deposits. Characteristics considered common to both include: multi‐storey, laterally extensive (sheet‐like) amalgamated channel belts, dominance of downstream accreting bedforms, no fining upwards grain‐size profile and little or no fine‐grained sediment and/or soil preservation. In contrast, features considered characteristic of meandering rivers such as inclined heterolithic stratification, high palaeocurrent dispersion, single storey channels and fining upwards grain‐size profiles are absent. The authors suggest that no single criterion can be used to definitively identify sandy meander belt deposits in the rock record and that a combination of systematic variations in accretion direction, palaeocurrent dispersal patterns and recognition of storey scale accretion surfaces is necessary to identify clearly this fluvial style. The common occurrence and distribution of sandy meander belts in modern sedimentary basins together with their limited recognition in the rock record suggests that their true stratigraphic distribution has yet to be determined. This has important implications for palaeogeographic reconstructions, understanding the impact of plant colonisation on fluvial planform style and predicting sandstone body dimensions and internal heterogeneity distribution within hydrocarbon reservoirs and aquifers.",
keywords = "Meander‐belts, rivers, planform, storey, accretion",
author = "Hartley, {Adrian J} and Amanda Owen and Weissmann, {Gary S.} and Scuderi, {Louis A.}",
year = "2018",
month = "12",
day = "10",
doi = "10.1002/9781119424437.ch14",
language = "English",
isbn = "9781119424468",
series = "Special Publication- International Association of Sedimentologists",
publisher = "International Association of Sedimentologists",
pages = "349--384",
editor = "Ghinassi, {Massimiliano } and Luca Colombera and {Mountney }, {Nigel P. } and Reesink, {Arnold Jan H. } and Bateman, {Mark }",
booktitle = "Fluvial Meanders and Their Sedimentary Products in the Rock Record",

}

TY - CHAP

T1 - Modern and ancient amalgamated sandy meander‐belt deposits

T2 - recognition and controls on development

AU - Hartley, Adrian J

AU - Owen, Amanda

AU - Weissmann, Gary S.

AU - Scuderi, Louis A.

PY - 2018/12/10

Y1 - 2018/12/10

N2 - Amalgamated sandy meander belts and their deposits are common in modern continental and marine‐connected basins yet comprise a minor constituent of the reported fluvial rock record. This suggests that either amalgamated meander‐belts are uncommon in the rock record or that the recognition criteria are lacking to identify sandy meandering river deposits. To address this apparent discrepancy, the authors document the range and occurrence of amalgamated sandy meander belts (ASMB) from modern basins and the stratigraphic record. ASMB are widely distributed throughout both present and rock record sedimentary basins occurring in foreland, extensional, cratonic, strike‐slip and passive margin basins. They occur in all climatic settings ranging from tundra to hot deserts. Three specific occurrences of ASMB are recognised in modern basins: in the proximal to medial parts of distributive fluvial systems (DFS), as laterally‐confined belts that mainly form axial fluvial systems; and as valley‐confined meander belts that may infill bedrock, alluvial or coastal plain valleys. From the limited amount of rock record examples of ASMB that are available, it is clear that they occur in similar settings to those observed in modern basins, the recognition of which provides a framework for the further prediction and identification of ASMB in the rock record. The lack of recognition of ASMB in the rock record is considered to be due to an absence of characteristics that allow clear distinction between sandy meandering and braided fluvial deposits. Characteristics considered common to both include: multi‐storey, laterally extensive (sheet‐like) amalgamated channel belts, dominance of downstream accreting bedforms, no fining upwards grain‐size profile and little or no fine‐grained sediment and/or soil preservation. In contrast, features considered characteristic of meandering rivers such as inclined heterolithic stratification, high palaeocurrent dispersion, single storey channels and fining upwards grain‐size profiles are absent. The authors suggest that no single criterion can be used to definitively identify sandy meander belt deposits in the rock record and that a combination of systematic variations in accretion direction, palaeocurrent dispersal patterns and recognition of storey scale accretion surfaces is necessary to identify clearly this fluvial style. The common occurrence and distribution of sandy meander belts in modern sedimentary basins together with their limited recognition in the rock record suggests that their true stratigraphic distribution has yet to be determined. This has important implications for palaeogeographic reconstructions, understanding the impact of plant colonisation on fluvial planform style and predicting sandstone body dimensions and internal heterogeneity distribution within hydrocarbon reservoirs and aquifers.

AB - Amalgamated sandy meander belts and their deposits are common in modern continental and marine‐connected basins yet comprise a minor constituent of the reported fluvial rock record. This suggests that either amalgamated meander‐belts are uncommon in the rock record or that the recognition criteria are lacking to identify sandy meandering river deposits. To address this apparent discrepancy, the authors document the range and occurrence of amalgamated sandy meander belts (ASMB) from modern basins and the stratigraphic record. ASMB are widely distributed throughout both present and rock record sedimentary basins occurring in foreland, extensional, cratonic, strike‐slip and passive margin basins. They occur in all climatic settings ranging from tundra to hot deserts. Three specific occurrences of ASMB are recognised in modern basins: in the proximal to medial parts of distributive fluvial systems (DFS), as laterally‐confined belts that mainly form axial fluvial systems; and as valley‐confined meander belts that may infill bedrock, alluvial or coastal plain valleys. From the limited amount of rock record examples of ASMB that are available, it is clear that they occur in similar settings to those observed in modern basins, the recognition of which provides a framework for the further prediction and identification of ASMB in the rock record. The lack of recognition of ASMB in the rock record is considered to be due to an absence of characteristics that allow clear distinction between sandy meandering and braided fluvial deposits. Characteristics considered common to both include: multi‐storey, laterally extensive (sheet‐like) amalgamated channel belts, dominance of downstream accreting bedforms, no fining upwards grain‐size profile and little or no fine‐grained sediment and/or soil preservation. In contrast, features considered characteristic of meandering rivers such as inclined heterolithic stratification, high palaeocurrent dispersion, single storey channels and fining upwards grain‐size profiles are absent. The authors suggest that no single criterion can be used to definitively identify sandy meander belt deposits in the rock record and that a combination of systematic variations in accretion direction, palaeocurrent dispersal patterns and recognition of storey scale accretion surfaces is necessary to identify clearly this fluvial style. The common occurrence and distribution of sandy meander belts in modern sedimentary basins together with their limited recognition in the rock record suggests that their true stratigraphic distribution has yet to be determined. This has important implications for palaeogeographic reconstructions, understanding the impact of plant colonisation on fluvial planform style and predicting sandstone body dimensions and internal heterogeneity distribution within hydrocarbon reservoirs and aquifers.

KW - Meander‐belts

KW - rivers

KW - planform

KW - storey

KW - accretion

U2 - 10.1002/9781119424437.ch14

DO - 10.1002/9781119424437.ch14

M3 - Chapter

SN - 9781119424468

T3 - Special Publication- International Association of Sedimentologists

SP - 349

EP - 384

BT - Fluvial Meanders and Their Sedimentary Products in the Rock Record

A2 - Ghinassi, Massimiliano

A2 - Colombera, Luca

A2 - Mountney , Nigel P.

A2 - Reesink, Arnold Jan H.

A2 - Bateman, Mark

PB - International Association of Sedimentologists

ER -