Seasonal Controls On the Development And Character of Inclined Heterolithic Stratification In A Tide-Influenced, Fluvially Dominated Channel: Fraser River, Canada

Sisulak, Chad F.; Dashtgard, Shahin E.

doi:10.2110/jsr.2012.21

Cited by 106 publications

(93 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Ophiomorpha traces and its fecal pellets ascrived to the depauperate Skolithos ichnofacies suggest energetic conditions, as does the presence of abundant isolated fecal pellets (Vilas et al, 2010) (Table 3). The lowdiversity and preponderance of vertical traces in these facies suggests brackish-water conditions prevailed (Sisulack and Dashtgard, 2012) with the area being subject to periodic freshwater discharge (Pearson et al, 2012). Such biogenic reworking attests a highenergy environment in which sands were initially deposited and then colonized by different opportunistic invertebrates (Pearson et al, 2012).…”

Section: Facies Association 4: Tidal Channel Depositsmentioning

confidence: 99%

Paleoenvironmental reconstruction of the coastal Monte Léon and Santa Cruz formations (Early Miocene) at Rincón del Buque, Southern Patagonia: A revisited locality

Raigemborn

Matheos

Krapovickas

et al. 2015

Journal of South American Earth Sciences

View full text Add to dashboard Cite

a b s t r a c tSedimentological, ichnological and paleontological analyses of the Early Miocene uppermost Monte Le on Formation and the lower part of the Santa Cruz Formation were carried out in Rinc on del Buque (RDB), a fossiliferous locality north of Río Coyle in Santa Cruz Province, Patagonia, Argentina. This locality is of special importance because it contains the basal contact between the Monte L eon (MLF) and the Santa Cruz (SCF) formations and because it preserves a rich fossil assemblage of marine invertebrates and marine trace fossils, and terrestrial vertebrates and plants, which has not been extensively studied. Ã 90 m-thick section of the MLF and the SCF that crops out at RDB was selected for this study. Eleven facies associations (FA) are described, which are, from base to top: subtidaleintertidal deposits with Crassotrea orbignyi and bioturbation of the Skolithos-Cruziana ichnofacies (FA1); tidal creek deposits with terrestrial fossil mammals and Ophiomorpha isp. burrows (FA2); tidal flat deposits with Glossifungites ichnofacies (FA3); deposits of tidal channels (FA4) and tidal sand flats (FA5) both with and impoverish Skolithos ichnofacies associated; marsh deposits (FA6); tidal point bar deposits recording a depauperate mixture of both the Skolithos and Cruziana ichnofacies (FA7); fluvial channel deposits (FA8); fluvial point bar deposits (FA9); floodplain deposits (FA10); and pyroclastic and volcaniclastic deposits of the floodplain where terrestrial fossil mammal remains occur (FA11).The transition of the MLFeSCF at RDB reflects a changing depositional environment from the outer part of an estuary (FA1) through the central (FA2e6) to inner part of a tide-dominated estuary (FA7). Finally a fluvial system occurs with single channels of relatively low energy and low sinuosity enclosed by a broad, low-energy floodplain dominated by partially edaphized ash-fall, sheet-flood, and overbank deposits (FA8e11). Pyroclastic and volcaniclastic materials throughout the succession must have been deposited as ash-fall distal facies in a fluvial setting and also were carried by fluvial streams and redeposited in both estuarine and fluvial settings. These materials preserve most of the analyzed terrestrial fossil mammals that characterize the Santacrucian age of the RDB's succession. Episodic sedimentation under volcanic influence, high sedimentation rates and a relatively warm and seasonal climate are inferred for the MLF and SCF section.Lateral continuity of the marker horizons at RDB serve for correlation with other coastal localities such as the lower part of the coastal SCF south of Río Coyle (~17.6e17.4 Ma) belonging to the Estancia La Costa Member of the SCF.

show abstract

Section: Facies Association 4: Tidal Channel Depositsmentioning

confidence: 99%

Paleoenvironmental reconstruction of the coastal Monte Léon and Santa Cruz formations (Early Miocene) at Rincón del Buque, Southern Patagonia: A revisited locality

Raigemborn

Matheos

Krapovickas

et al. 2015

Journal of South American Earth Sciences

View full text Add to dashboard Cite

show abstract

“…However, some recent studies, notably Willis et al (1999), Willis and Gabel (2001), Ainsworth (2003), Willis (2005), Ainsworth et al (2008), Plink-Björklund (2008), Ichaso and Dalrymple (2009), Steel et al (2012), and Legler et al (2013), document ancient successions that demonstrate significant tidal influence during regression and the development of seaward-stepping intervals. Recent studies of Holocene systems likewise showcase progradational settings reflecting marked tidal influence (e.g., Dashtgard et al 2009;Sisulak and Dashtgard 2012;Nanson et al 2012Nanson et al , 2013Massey et al 2014).…”

Section: Introductionmentioning

confidence: 96%

Architecture and Evolution of A Regressive, Tide-Influenced Marginal Marine Succession, Drumheller, Alberta, Canada

Ainsworth

Vakarelov

Lee

et al. 2015

Journal of Sedimentary Research

Self Cite

View full text Add to dashboard Cite

Tide-dominated and tide-influenced clastic depositional environments are typically interpreted to be associated with landward-stepping or transgressive systems. Here, we present an example of an overall regressive succession dominated by high-frequency sequences that exhibit abundant sedimentary and ichnological evidence of tidal processes. These strata comprise the Campanian Bearpaw-Horseshoe Canyon Formation transition exposed near Drumheller, Alberta, Canada. The clastic marine to marginal-marine sediments were deposited in mixed-process (wave-, tide-, and fluvial-influenced) depositional environments along the western margin of a foreland basin. The deposits are subdivided into six relatively thin (10 m on average), high-frequency (, 140,000 years), transgressive-regressive (T-R) sequences (A to F).Outcrop sedimentary logs and hand-held gamma-ray profiles were correlated to subsurface data (4 cored wells and 75 wells with wireline logs) within an area of 22 km 3 16 km in order to generate a 3D geocellular computer model. This model along with paleocurrent data from outcrop were used to analyze the stratigraphic architecture and evolution of the succession.The evolution of the successive T-R sequences was mapped on a subregional scale using the 3D geocellular model. The orientations of the paleoshorelines rotate in a predictable manner during transgression and regression. Transgressive shorelines are oriented approximately S-N and rotate clockwise during regression to approximately SW-NE. The rotations are attributed to the paleogeography of the region, with the study area interpreted to sit on the western flank of a large structurally controlled embayment.The progradational high-frequency sequence set is dominated by tide-influenced strata and clearly demonstrates that tidal deposits can be preserved in both regressive as well as transgressive successions. Tidal influence in this regressive setting is attributed to shallow water depths on a wide shelf, which resulted in amplification of the tidal wave as it moved across the shelf. The embayed character of the coastline may also have augmented this effect. Tidal range is estimated to have been mesotidal to macrotidal. A modern partial analogue for the Horseshoe Canyon systems is identified from the tropical Mitchell River Delta in the Gulf of Carpentaria, Queensland, Australia. This delta system is analogous in terms of its tideinfluenced facies, mesotidal range, low-gradient shelf with accompanying shallow water depths, the mixed-process character of its shoreline systems, and its horizontal to falling shoreline trajectory.

show abstract

“…Macroform cross-bedding in many cases resembles Inclined Heterolithic Stratification (IHS), which Thomas et al (1987) argued is characteristic of lateral accretion on meandering reaches within the fluvial-tidal transition. Although not exclusive to such environments, IHS is now abundantly documented from the fluvial-tidal transition zone of modern systems (e.g., Dashtgard and Gingras, 2005;Sisulak and Dashtgard, 2012). The impoverished trace fossil suite is characteristic of highly stressed environments and wholly consistent with other examples of estuarine trace fossil suites (MacEachern and Gingras et al, 2011;Gingras and MacEachern, 2012).…”

Section: Facies Est1 -Estuarine Channelmentioning

confidence: 81%

Onset of the glacioeustatic signal recording late Palaeozoic Gondwanan ice growth: New data from palaeotropical East Fife, Scotland

Fielding

Frank

2015

Palaeogeography, Palaeoclimatology, Palaeoecology

View full text Add to dashboard Cite

Seasonal Controls On the Development And Character of Inclined Heterolithic Stratification In A Tide-Influenced, Fluvially Dominated Channel: Fraser River, Canada

Cited by 106 publications

References 33 publications

Paleoenvironmental reconstruction of the coastal Monte Léon and Santa Cruz formations (Early Miocene) at Rincón del Buque, Southern Patagonia: A revisited locality

Paleoenvironmental reconstruction of the coastal Monte Léon and Santa Cruz formations (Early Miocene) at Rincón del Buque, Southern Patagonia: A revisited locality

Architecture and Evolution of A Regressive, Tide-Influenced Marginal Marine Succession, Drumheller, Alberta, Canada

Onset of the glacioeustatic signal recording late Palaeozoic Gondwanan ice growth: New data from palaeotropical East Fife, Scotland

Contact Info

Product

Resources

About