Imperial College London
Alternate

ProfessorAlFraser

Faculty of Engineering, Department of Earth Science & Engineering

Visiting Professor
 
 
 
//

Contact

 

+44 (0)20 7594 6530alastair.fraser

 
 
//

Location

 

1.35Royal School of MinesSouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Angus:2020:10.2110/jsr.2020.19,
author = {Angus, L and Hampson, G and Palci, F and Fraser, A},
doi = {10.2110/jsr.2020.19},
journal = {Journal of Sedimentary Research},
pages = {313--335},
title = {Characteristics and context of high-energy, tidally modulated, barred shoreface deposits: Kimmeridgian–Tithonian sandstones, Weald Basin, southern UK and northern France},
url = {http://dx.doi.org/10.2110/jsr.2020.19},
volume = {90},
year = {2020}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The influence of tides on the sedimentology of wave-dominated shorefaces has been emphasized in recent studies of modern shorelines and related facies models, but few ancient examples have been reported to date. Herein, we use a case study from the stratigraphic record to develop a revised facies model and predictive spatio-temporal framework for high-energy, tidally modulated, wave-dominated, barred shorefaces.Kimmeridgian–Tithonian shallow-marine sandstones in the Weald Basin (southern England and northern France) occur as a series of laterally extensive tongues that are 5–24 m thick. Each tongue coarsens upward in its lower part and fines upward in its upper part. The lower part of each upward-coarsening succession consists of variably stacked, hummocky cross-stratified, very fine- to fine-grained sandstone beds and mudstone interbeds that are moderately to intensely bioturbated by a mixed Skolithos and Cruziana ichnofacies. This lower part of the succession is interpreted to record deposition on the subtidal lower shoreface, between effective storm wave base and fairweather wave base. The upper part of each upward-coarsening succession comprises cross-bedded, medium- to coarse-grained sandstones that are pervasively intercalated with mudstone-draped, wave-rippled surfaces (including interference ripples) which mantle the erosional bases of trough cross-sets. Bioturbation is patchy, and constitutes a low-diversity Skolithos ichnofacies. Cross-bedded sandstones are arranged into cosets superimposed on steeply dipping (up to 10) clinoforms that dip offshore and alongshore, and extend through the succession. These deposits are interpreted to record shallow subtidal and intertidal bars on the upper shoreface, which likely contained laterally migrating rip channels or formed part of a spit. The lower, upward-coarsening part of each sandstone tongue represents an upward-shallowing, regressive shoreface succession in which the internal bedding of upper-shor
AU  - Angus,L
AU  - Hampson,G
AU  - Palci,F
AU  - Fraser,A
DO  - 10.2110/jsr.2020.19
EP  - 335
PY  - 2020///
SN  - 1527-1404
SP  - 313
TI  - Characteristics and context of high-energy, tidally modulated, barred shoreface deposits: Kimmeridgian–Tithonian sandstones, Weald Basin, southern UK and northern France
T2  - Journal of Sedimentary Research
UR  - http://dx.doi.org/10.2110/jsr.2020.19
UR  - http://hdl.handle.net/10044/1/78017
VL  - 90
ER  -
Download