Sea level changes in the upper Aptian-lower/middle(?) Turonian sequence of Cauvery Basin, India – An ichnological perspective

Paranjape, Amruta R.; Kulkarni, Kantimati G.; Kale, Anand S.

doi:10.1016/j.cretres.2014.11.005

Cited by 13 publications

(6 citation statements)

References 14 publications

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“…A similar assemblage of trace fossils, typical of shallow-marine environments (shoreface), were de-scribed by Singh et al (2008), Paranjape et al (2014) and Bayet-Goll et al (2015).…”

Section: Palaeoenvironment Of Coniacian Sandstonessupporting

confidence: 56%

Coniacian sandstones from the North Sudetic Synclinorium revisited: palaeoenvironmental and palaeogeographical reconstructions based on trace fossil analysis and associated body fossils

Chrząstek

Wypych

2018

Geologos

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The Coniacian quartz sandstones (Żerkowice Member, Rakowice Wielkie Formation) that crop out at quarries near Czaple-Nowa Wieś Grodziska (North Sudetic Synclinorium) contain a low-diversity assemblage of trace fossils:Gyrochorteisp.,Ophiomorpha nodosaLundgren, 1891,Ophiomorphaisp.,Phycodescf.curvipalmatum(Pollard, 1981), ?Phycodesisp.,Planolitescf.beverleyensis(Billings, 1862),Thalassinoides paradoxicusWoodward, 1830 and ?Thalassinoidesisp. Moreover, interesting compound burrow systems, here referred to asThalassinoides-Phycodescf.palmatusand ?Thalassinoides-Phycodes, were recognised at the Czaple Quarry. Additionally, ?Gyrochorteisp.,Phycodescf.flabellum(Miller and Dyer, 1878) and ?Treptichnusisp. were encountered at correlative levels in the Rakowice Małe Quarry. Some of these ichnotaxa have not been recorded previously from Coniacian sandstones of the Żerkowice Member. Additionally, in slabs of these sandstones, the gastropodNerinea bicinctaBronn, 1836 and the bivalveLima haidingeriZittel, 1866 were found. These interesting finds, in particular the gastropods, were already noted from the study area in the first half of the twentieth century by Scupin (1912–1913). Ethologically, the trace fossil assemblage is represented by domichnia or domichnia/fodinichnia (Ophiomorpha,Thalassinoides), fodinichnia (Phycodes) and pascichnia (Gyrochorte,Planolites). The compound burrow systems (Thalassinoides-Phycodes) are interpreted as dwelling/feeding structures. The possible tracemakers are crustaceans (Ophiomorpha,Thalassinoides) or worm-like animals (annelids and other) (Planolites, ?Phycodes,Gyrochorteand ?Treptichnus). The assemblage of trace fossils is characteristic of theSkolithosichnofacies andCruzianaichnofacies, typical of shallow-marine settings. Ichnological studies, as well as the presence of accompanying fossils (bivalves, gastropods), confirm the palaeoenvironmental reconstruction of the Żerkowice Member sandstones by Leszczyński (2010). That author interpreted the Coniacian sandstones as bar and storm deposits laid down in a shallow epicontinental sea (mainly the foreshore-upper shoreface; up to the middle shoreface) under normal oxygenation and salinity, in soft substrate, above fair-weather wave base. The deposition of the Żerkowice Member sandstones is linked to a regression that started after uplift of the southeastern part of the North Sudetic Synclinorium.

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“…A similar assemblage of trace fossils, typical of shallow-marine environments (shoreface), were de-scribed by Singh et al (2008), Paranjape et al (2014) and Bayet-Goll et al (2015).…”

Section: Palaeoenvironment Of Coniacian Sandstonessupporting

confidence: 56%

Coniacian sandstones from the North Sudetic Synclinorium revisited: palaeoenvironmental and palaeogeographical reconstructions based on trace fossil analysis and associated body fossils

Chrząstek

Wypych

2018

Geologos

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“…Towards the western part of the basin, the sand-rich Nannilam Formation of the Santonian-Campanian age provides significant exploration objectives (Chakravorti et al 2006), which is unconformably overlain by thick Porto-Novo shale (top of Ariyalur group) of Campanian-Maastrichtian age. The Ariyalur-Pondicherry subbasin in the northeastern part appears to have hosted the deep-water sedimentary facies during the Late Cretaceous (Paranjape et al 2015). It was the period of widespread sedimentation under marine conditions of different local and regional transgressive phases.…”

Section: Postrift Stratigraphy (Late Cretaceous and Above)mentioning

confidence: 99%

Post-drill geophysical characterization of two deep-water wells of Cauvery Basin, East Coast of India

Mishra¹,

Patidar

2022

J Petrol Explor Prod Technol

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The depth of the reservoir causes an increase in the degree of uncertainty in the prediction of reservoir quality. High frequency is suppressed with depth because Earth functions as a low-pass filter. The seismic amplitudes observed at various interfaces are influenced by spherical divergence, transmission losses, mode conversions, and inter-bed multiples. Seismic data have numerous essential components that must be thoroughly examined during hydrocarbon prospect identification and maturation, including post-critical reflections, events coherency (in near and far offsets), mode conversion, and interbed multiples. Seismic amplitudes are typically derived from 2D/3D seismic data and utilized directly or indirectly for reservoir interpretation and better prediction of subtle geological and geophysical information. To accurately depict subsurface geological features, stratigraphic architecture, and reservoir facies, it should be used in conjunction with the existing paleoenvironment data. When employed alone, the subsurface geophysical data may lead to erroneous interpretation of subsurface lithologies and inaccurate reservoir property predictions. Understanding these factors could help interpreters make better use of seismic data while maturing and de-risking the prospectivity. This study examines the post-drill geophysical characterization of two exploratory wells that were drilled in the deep-water area of the Cauvery Basin, East Coast of India. Analysis and correlation with a discovery well is done to understand the sediment depositional heterogeneity and corresponding seismic amplitude response, primarily for the cemented reservoir (dry well). To discover prospects and subsequently de-risk the existing prospect inventory, a dashboard checklist for in-depth study of seismic and well data has been developed. The top-down geophysical analytical approach that has been presented will aid in defining reservoir characteristics generally, estimating deliverability, and subsequently raising the geological probabilities and chance of success (COS) of any exploration project. The findings of this study allow critical analysis of seismic data to distinguish between softer/slower/possibly better reservoir rocks and hard/fast/tight rocks.

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“…comprises the oldest marine strata in the basin and was dated as late Albian to middle Turonian by Sundaram and Rao (1986). It is a mudstone dominated facies overlying the break-up unconformity or onlapping onto Precambrian crystalline basement in the western extremities of the basin (Paranjape et al, 2015). The upper contact of the Karai Fm.…”

Section: Geological History and Cretaceous Stratigraphymentioning

confidence: 99%

“…A group of three-meter-thick highly glauconitic beds, each capped by a thin sandstone are present (436-446 m). An outline log of this locality with palaeoenvironmental interpretation based on trace fossils was provided by Paranjape et al (2015).…”

Section: The Karai Sectionmentioning

confidence: 99%

Cretaceous (Albian-Turonian) calcareous nannofossil biostratigraphy of the onshore Cauvery Basin, southeastern India

Kanungo

Bown

Gale

2021

Cretaceous Research

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A suite of outcrop samples from the Cauvery Basin belonging to the mudrock-claystone dominated Karai Formation were analysed for nannofossil biostratigraphy in two newly measured sections at Karai and Garudamangalam. The age of the Karai Section is interpreted as early Albian to early Turonian, whereas the Garudamangalam Section is interpreted as late Albian to late Cenomanian. The Albian 'BC' zones of are applicable in both sections, whereas the Cenomanian and Turonian 'UC' zones of Burnett (1998), are only partially applicable, due to some problematic primary and secondary markers. The Albian-Cenomanian 21 boundary appears to be continuous and is approximated in both sections using the FO of lower Cenomanian ammonites of the M. mantelli Zone. The Cenomanian-Turonian boundary interval Highlights• A high-resolution Albian-Turonian biostratigraphy is established for the Cauvery Basin using integrated calcareous nannofossil and ammonite data.• The FO of G. ponticula is proposed as a new nannofossil proxy for approximating the Albian-Cenomanian boundary.• A Cenomanian-Turonian boundary interval hiatus equivalent to Nannofossil Zone UC5 is present, representing a magnitude of ~0.66 Myr.• The Austral character of the Cauvery Basin nannoplankton assemblages is suppressed.

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Sea level changes in the upper Aptian-lower/middle(?) Turonian sequence of Cauvery Basin, India – An ichnological perspective

Cited by 13 publications

References 14 publications

Coniacian sandstones from the North Sudetic Synclinorium revisited: palaeoenvironmental and palaeogeographical reconstructions based on trace fossil analysis and associated body fossils

Coniacian sandstones from the North Sudetic Synclinorium revisited: palaeoenvironmental and palaeogeographical reconstructions based on trace fossil analysis and associated body fossils

Post-drill geophysical characterization of two deep-water wells of Cauvery Basin, East Coast of India

Cretaceous (Albian-Turonian) calcareous nannofossil biostratigraphy of the onshore Cauvery Basin, southeastern India

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