scholarly journals Recognizing seasonal fluvial influence in ancient tidal deposits

2016 ◽  
Vol 444 (1) ◽  
pp. 287-303 ◽  
Author(s):  
Annalize Q. McLean ◽  
Brent Wilson
Keyword(s):  
Tidal Deposits

CONTRASTING TIDAL DEPOSITS IN THE NEOGENE OF EASTERN BORNEO

2017 ◽  
Author(s):  
Jon Noad ◽  
Keyword(s):  
Tidal Deposits

Offshore tidal deposits: sand sheet and sand bank facies

1982 ◽  
pp. 95-125 ◽  
Author(s):  
A. H. Stride
Keyword(s):  
Sand Bank ◽  
Tidal Deposits ◽  
Sand Sheet

Iron-rich carbonate tidal deposits, Angepena Formation, South Australia: A redox-stratified Cryogenian basin

2020 ◽  
Vol 342 ◽  
pp. 105668
Author(s):  
Brennan O'Connell ◽  
Malcolm W. Wallace ◽  
Ashleigh v.S. Hood ◽  
Maxwell A. Lechte ◽  
Noah J. Planavsky
Keyword(s):  
South Australia ◽  
Tidal Deposits

Recent Tidal Deposits, Abu Dhabi, UAE, Arabian Gulf

1975 ◽  
pp. 209-214 ◽  
Author(s):  
Jean F. Schneider
Keyword(s):  
Arabian Gulf ◽  
Abu Dhabi ◽  
Tidal Deposits

Recognizing tide- and wave-dominated compound deltaic clinothems in the rock record

Geology ◽  
2020 ◽  
Vol 48 (12) ◽  
pp. 1149-1153
Author(s):  
Yang Peng ◽  
Cornel Olariu ◽  
Ronald J. Steel
Keyword(s):  
Seismic Data ◽  
Three Dimensional ◽  
Gravity Flow ◽  
Small Scale ◽  
Sedimentary Record ◽  
Sediment Gravity Flow ◽  
Rock Record ◽  
Storm Wave ◽  
Tidal Deposits

Abstract Many modern deltas exhibit a compound geometry that consists of a shoreline clinoform and a larger subaqueous clinoform connected through a subaqueous platform. Despite the ubiquity of compound clinoforms in modern deltas, very few examples have been documented from the ancient sedimentary record. We present recognition criteria for shelf compound-clinoform systems in both tide- and wave-dominated deltas by integration of ancient and modern examples from multiple types of data. The compound clinothem can be identified by using a combination of: (1) the three-dimensional (3-D) configuration identified in bathymetric or seismic data, (2) bipartite stacked regressive units, consisting of a lower muddy coarsening-to-fining-upward (CUFU) or coarsening-upward (CU) unit (30–100 m thick) and an overlying sandier CU unit (5–30 m thick) (together they represent the subaqueous and shoreline clinoform pair), and (3) distinct facies described herein, though both types of delta have highly bioturbated mudstone and siltstone bottomsets. Tide-dominated deltas have muddy foresets with tidal scours containing tidal rhythmites or inclined heterolithic strata in the subaqueous clinothem overlain by river and tidal deposits of the shoreline clinothem. Wave-dominated deltas show mainly wave-enhanced sediment-gravity-flow (WSGF) beds and some thin hummocky/swaley cross-stratified (HCS/SCS) sandstones toward the top in the subaqueous muddy foreset, and upward-thickening HCS/SCS and trough/planar cross-bedded sandstones interbedded with siltstones in the shoreline clinothem. The subaqueous platform, which links the clinoform couplet, shows evidence of frequent tidal or wave reworking and redeposition. The platform in tide-dominated deltas is characterized by tide-generated heterolithic strata (e.g., bidirectional current-rippled and cross-stratified sandstones, spring and neap tidal bundles, tidal rhythmites) with occasional storm-wave–influenced strata. In contrast, the wave-dominated platform comprises small-scale swales with scours and mud clasts and some WSGF deposits. The proposed criteria can aid in the recognition of compound deltaic clinothems in other basins, particularly those with limited amounts and/or types of data.

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