Carbon, oxygen and strontium isotopic signatures in Maastrichtian-Danian limestones of the Cauvery Basin, South India

Madhavaraju, Jayagopal; Sial, Alcídes N.; Rakhinath, Reghunathan; Ramasamy, S.; Lee, Yong Il; Ramachandran, A.

doi:10.1007/s12303-014-0039-1

Cited by 6 publications

(2 citation statements)

References 70 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…and Gryphaea sp . 10 , 11 . It has been argued, based on the presence of hummocky cross stratification, that the sediments containing the shells were transported from a nearby shelf region and re-deposited as a result of storm activity 10 .…”

Section: Introductionmentioning

confidence: 99%

Rainfall seasonality on the Indian subcontinent during the Cretaceous greenhouse

Ghosh

Prasanna

Banerjee

et al. 2018

Sci Rep

View full text Add to dashboard Cite

The Cretaceous greenhouse climate was accompanied by major changes in Earth’s hydrological cycle, but seasonally resolved hydroclimatic reconstructions for this anomalously warm period are rare. We measured the δ18O and CO2 clumped isotope Δ47 of the seasonal growth bands in carbonate shells of the mollusc Villorita cyprinoides (Black Clam) growing in the Cochin estuary, in southern India. These tandem records accurately reconstruct seasonal changes in sea surface temperature (SST) and seawater δ18O, allowing us to document freshwater discharge into the estuary, and make inferences about rainfall amount. The same analytical approach was applied to well-preserved fossil remains of the Cretaceous (Early Maastrichtian) mollusc Phygraea (Phygraea) vesicularis from the nearby Kallankuruchchi Formation in the Cauvery Basin of southern India. The palaeoenvironmental record shows that, unlike present-day India, where summer rainfall predominates, most rainfall in Cretaceous India occurred in winter. During the Early Maastrichtian, the Indian plate was positioned at ~30°S latitude, where present-day rainfall and storm activity is also concentrated in winter. The good match of the Cretaceous climate and present-day climate at ~30°S suggests that the large-scale atmospheric circulation and seasonal hydroclimate patterns were similar to, although probably more intense than, those at present.

show abstract

Section: Introductionmentioning

confidence: 99%

Rainfall seasonality on the Indian subcontinent during the Cretaceous greenhouse

Ghosh

Prasanna

Banerjee

et al. 2018

Sci Rep

View full text Add to dashboard Cite

show abstract

“…1). These sedimentary successions have been studied by many researchers focusing on stratigraphy, sequence stratigraphy, paleontology, clay mineralogy, geochemistry, depositional environments and tectonic evolution (Srivastava and Tewari 1969;Banerji 1972;Sastry et al 1972;Sundaram and Rao 1986;Ramasamy and Banerji 1991;Govindan et al 1996;Madhavaraju and Ramasamy 1999a, b, 2001Sundaram et al 2001;Nagendra et al 2002Nagendra et al , 2011aMadhavaraju et al , 2004Madhavaraju et al , 2006Madhavaraju et al , 2015Madhavaraju andLee 2009, 2010;Ramkumar et al 2011;Madhavaraju 2015).…”

Section: Geology and Stratigraphymentioning

confidence: 99%

Petrography and stable isotopic variations in Dalmiapuram Formation of Cauvery Basin, South India: implication on OAE1d

et al. 2015

View full text Add to dashboard Cite

Petrography, carbon and oxygen isotopic study was carried out to interpret isotopic variations on the predominant carbonate sequence of the Dalmiapuram Formation of the Cauvery Basin, South India. The common petrographic types identified in the Dalmiapuram Formation range from wackestone to boundstone. The gray shale and limestone members show large variations in d 13 C and d 18 O values (Gray shale member: ?1.44 to ?2.40 % VPDB, -3.05 to -5.92 % VPDB, respectively; Limestone member: -6.07 to ?2.93 % VPDB; -7.08 to -0.39 % VPDB; respectively). In the present study, the carbon and oxygen values are not correlated, which supports the fact that these limestones retain their primary isotopic signatures. In carbon isotope curve, one negative shift is identified in the gray shale member and a positive isotopic excursion is detected in the coral algal limestone (CAL). The observed positive isotopic excursion in the lower part of the CAL correlates with OAE1d and suggests the global nature of the late Albian OAE1d in the Cauvery Basin.

show abstract

Chemo- and biostratigraphy of the Cretaceous Dalmiapuram Formation, Uttatur Group, Kallakudi II section, Cauvery Basin, South India

et al. 2021

View full text Add to dashboard Cite

Carbon, oxygen and strontium isotopic signatures in Maastrichtian-Danian limestones of the Cauvery Basin, South India

Cited by 6 publications

References 70 publications

Rainfall seasonality on the Indian subcontinent during the Cretaceous greenhouse

Rainfall seasonality on the Indian subcontinent during the Cretaceous greenhouse

Petrography and stable isotopic variations in Dalmiapuram Formation of Cauvery Basin, South India: implication on OAE1d

Chemo- and biostratigraphy of the Cretaceous Dalmiapuram Formation, Uttatur Group, Kallakudi II section, Cauvery Basin, South India

Contact Info

Product

Resources

About