Stratigraphic Architecture of a Net-Transgressive Marginal- to Shallow-Marine Succession: Upper Almond Formation, Rock Springs Uplift, Wyoming, U.S.A.

Kieft, Rachel L.; Hampson, Gary J.; Jackson, Christopher; Larsen, Eirik

doi:10.2110/jsr.2011.44

Cited by 27 publications

(21 citation statements)

References 53 publications

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“…One possibility is that these sediments were deposited in the sub‐tidal domain of a large bay (possibly the incipient palaeo‐Gulf of Cambay; Fig. ), where wave energy was subdued due to the presence of distal sand bars at the mouth of the bay (Dalrymple et al ., ; Nio & Yang, ; MacEachern & Bann, ; Antia et al ., ; Kieft et al ., ). Such distal bars, away from the present‐day coastline of Gulf of Cambay, are also accreting at the mouth of modern bay.…”

Section: Resultsmentioning

confidence: 97%

“…Measured sections at Tadkeswar, Vastan and Valia show dominant grey shale, grey shale with silt/fine sand intercalations, occasional lignite/carbonaceous shale and fossiliferous grey shale. These features indicate that the sediment belonging to this facies association deposited in an estuarine environment in the eastern part of the basin, while in the western part it possibly deposited away from the estuarine front in a sub‐tidal domain of the bay (Yang et al ., ; Finzel et al ., ; Antia et al ., ; Kieft et al ., ). An increasing amount of sand up in the sections indicates that a permanent supply of the sand was probably established by this time.…”

Section: Resultsmentioning

confidence: 97%

“…Large lateral extension and tabular geometry of the beds also support the above interpretations. Based on the dilute nature of the flow depositing only silt/fine sandstone and poor faunal recovery in the grey shale, a deeper depositional environment is interpreted compared to fossiliferous grey shale (Dalrymple et al, 1991;Kieft et al, 2011). A comparatively low and narrow range (1Á0 to 1Á7%) of TOC values suggests a distal depositional environment for this facies, while the other facies characterized by a high and wide range of TOC values described above were possibly deposited in the proximal part of the basin.…”

Section: Grey Shale and Silt/fine Sand Intercalation (Shi)mentioning

confidence: 99%

“…Based on the deposition of abundant organic matter and total absence of current and wave features, its deposition in a coastal marsh environment punctuated only by storm waves is inferred. The presence of rip-up carbonaceous/ coal clasts at the base of the characteristic black sandstone bed associated with lignite suggests possible palaeo-tsunami deposits, because normal storms rarely produce rip-up clasts (Morton et al, 2007;Finzel et al, 2009;Antia et al, 2011;Kieft et al, 2011).…”

Section: Facies Association 2: Coastal Marshmentioning

confidence: 99%

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Climate‐modulated sequence development in a tropical rift basin during the Late Palaeocene to Early Eocene super greenhouse Earth

2016

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Sequence developments in rift basins are considered to be influenced largely by tectonics and to a lesser extent by eustatic sea-level and climate. Studies indicate that in passive margin basins, climate can mask the effects of tectonics and eustasy by modulating the sediment supply. It is, however, less understood how the sedimentary sequence in rift basins might respond to strong climatic fluctuations where tectonic pulses generate rapid accommodation space. Here a case study has been provided to assess the effect of climate vis a vis sea-level and tectonics on sequence development in the Cambay rift basin, western India, during the Early Palaeogene (Late Palaeocene to Early Eocene) super greenhouse globe. Facies analysis of this shale-lignite sequence suggests deposition in a lagoon/ bay, developed over the Deccan Trap basement. Detailed sequence stratigraphic analysis using basin-wide representative composite sections, marker lignite seam, event bed and high-resolution carbon isotope (d 13 C) chemostratigraphy suggest an overall transgressive motif. Among the three prominent Early Eocene eustatic highstands, only the one at ca 53Á7 Ma is expressed by the thickest coal accumulation throughout the basin. Expression of the other sequence stratigraphic surfaces is subdued and can be due to the overall finer grain size of the sediment or local variation in the subsidence rate at different fault-controlled mini-basins. Enigmatic presence of a maximum flooding surface coinciding with the 53Á7 Ma climate event (Eocene Thermal Maximum 2), manifested by negative carbon isotope excursion, indicates possible influence of climate over and above tectonics in developing the rift sequence. Qualitative rainfall variation assessed using the magnitude of the carbon isotope excursion and pollen abundance show that a relatively dry/low precipitation climatic phase during the Eocene Thermal Maximum 2 hindered the siliclastic supply to the basin. Thus, it has been inferred that climate-induced high siliciclastic supply possibly enhanced the autocyclic reorganization and hindered the development of the key sequence stratigraphic surfaces across the basin during climate extremes.

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 97%

Section: Grey Shale and Silt/fine Sand Intercalation (Shi)mentioning

confidence: 99%

Section: Facies Association 2: Coastal Marshmentioning

confidence: 99%

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Climate‐modulated sequence development in a tropical rift basin during the Late Palaeocene to Early Eocene super greenhouse Earth

2016

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“…Numerous studies document the preferential development and preservation of tidally influenced deposits in net-transgressive strata (e.g. Nio & Yang 1991;Sixsmith et al 2008;Kieft et al 2011). …”

Section: Vertical Increase In Abundance Of Tide-influenced Depositsmentioning

confidence: 99%

Sedimentology and sequence stratigraphy of the Middle–Upper Jurassic Krossfjord and Fensfjord formations, Troll Field, northern North Sea

Holgate

Jackson

Hampson

et al. 2013

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The Middle-Upper Jurassic Krossfjord and Fensfjord formations are secondary reservoir targets in the super-giant Troll oil and gas field, Horda Platform, offshore Norway. The formations comprise sandstones (c. 195 m thick) sourced from the Norwegian mainland to the east, that pinch out basinwards into offshore shales of the Heather Formation to the west. Sedimentological analysis of cores from the Troll Field has identified six facies associations, which represent wave-and tide-dominated deltaic, shoreline and shelf depositional environments. Resulting depositional models highlight the complex distribution of depositional environments, and reflect spatial and temporal variations in physical processes at the shoreline, rate of sediment supply and accommodation development. These models are further complicated by the absence of coastal plain facies, which implies that the Troll Field was fully subaqueous during deposition, that shoreline regression was forced by falling sea level or that coastal plain deposits were removed by transgression. Genetic sequences bounded by major flooding surfaces ('series') exhibit laterally uniform thicknesses, implying no major tectonic influence on sedimentation. The recognition of pronounced variability in facies character and stratigraphical architecture emphasize the need for a robust depositional model of the formations in order to drive future exploration in these, and coeval, reservoirs.

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Estuary rejuvenation in response to sea level rise: an example from Tairua Estuary, New Zealand

2019

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Stratigraphic Architecture of a Net-Transgressive Marginal- to Shallow-Marine Succession: Upper Almond Formation, Rock Springs Uplift, Wyoming, U.S.A.

Cited by 27 publications

References 53 publications

Climate‐modulated sequence development in a tropical rift basin during the Late Palaeocene to Early Eocene super greenhouse Earth

Climate‐modulated sequence development in a tropical rift basin during the Late Palaeocene to Early Eocene super greenhouse Earth

Sedimentology and sequence stratigraphy of the Middle–Upper Jurassic Krossfjord and Fensfjord formations, Troll Field, northern North Sea

Estuary rejuvenation in response to sea level rise: an example from Tairua Estuary, New Zealand

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