Did Deccan volcanism pre-date the Cretaceous/Tertiary transition?

Venkatesan, T. R.; Pande, Kanchan; Gopalan, K.

doi:10.1016/0012-821x(93)90015-2

Cited by 162 publications

(82 citation statements)

References 21 publications

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“…The decrease in temperature could probably be associated with a sea level change (Ginsburg, 1964, 1984, Brinkhuis and Zachariasse, 1988Keller, 1988). This gradual pattern is also consistent with the effect of massive volcanism (Officer y Drake, 1985 ;Courtillot et al, 1.986) that lasted at least 3 million years beginning about 2 million years before the K/T boundary (Venkatesan et al, 1993). Consequently, the probable cause that produced the gradual mass extinction of 23 species during the upper Maastrichtian and lower Danian, is not as simple as an extraterrestrial impact that produced the catastrophic mass extinction of the 47 species at the K/T boundary.…”

Section: Models and Causes Of Extinctionmentioning

confidence: 59%

The Cretaceous/Tertiary boundary mass extinction in planktic foraminifera at Agost, (Spain)

Molina

Arenillas

Arz

1996

Revue de Micropaléontologie

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ABSTRACT. --The planktic foraminiferal mass extinction across the Cretaceous/Tertiary boundary at Agost (Spain) occurred over an extended period, with 7 species disappearing in the late Maastrichtian, 47 species extinct at the K/T boundary and 16 ranging into the earliest Danian. The species that became extinct at the K/T boundary are large, complex tropical and subtropical forms dwelling in deep and intermediate water depths, which constitute only about 20 % of the individuals in the population larger than 63 microns. Nevertheless, their disappearance constitutes the major and sudden extinction event in the history of planktic foraminifera. However, the small cosmopolitan surface dwellers with simple morphologies appear to survive and the last of them gradually disappear in the lower part of the P. pseudobulloides Biozone. This planktic foraminiferal extinction model can be interpreted as a catastrophic mass extinction that centred at the K/T boundary, and was superimposed on a gradual mass extinction which began in the late Maastrichtian and continued into the early Danian. The catastrophic pattern of extinction at the K/T boundary is very compatible with the effect of a large meteorite impact, whereas the gradual and extended pattern of extinction across the Maastrichtian-Danian transition is compatible with temperature and sea level changes that may be related to massive volcanism.R~SUM~. -L'extinction en masse des foraminif~res planctoniques h travers la limite Cr6tac6/Tertiaire h Agost (Espagne) s'est produite au cours d'une certaine p6riode; 7 espbces disparaissant au Maastrichtien sup6rieur, 47 ~ la limite K/T et 16 au Danien inf6rieur. Les esp~ces ayant disparu h la limite K/T sont grandes et complexes, des formes vivant en milieux oc6aniques profonds tropicaux et subtropicaux, qui ne constituent qu'environ 20 % des individus de la population de taille sup6rieure h 63 microns. Cependant, leur disparition repr6sente l'6vbnement d'extinction le plus important et soudain de l'histoire des foraufinif~res planctoniques. Toutefois, les petites formes cosmopolites ayant une morphologie simple et vivant dans les eaux superficielles semblent avoir surv6cu et la phipart ont disparu progressivement darts la partie inf6rieure de la Biozone ~ P. pseudobuUoides. Ce module d'extinction des foraminif~res planctoniques peut ~tre consid6r6 comme une extinction en masse catastrophique eoncentr6e h la limite K/T et superpos6e h une extinction en masse graduelle qui avait commenc6 au Maastrichtien sup6rieur et continua jusqu'au Danien inf6rieur. Le module d'extinction catastrophique h la limite K/T est bien compatible avec les effets de l'in~pact d'un grand m6t6orite, tandis que le patron d'extinction graduelle au cours de la transition Maastrichtien-Danien l'est avec les changements de temp6rature et du nivean de lamer qui pourraient ~tre en rapport avec un volcanisme massif.

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Section: Models and Causes Of Extinctionmentioning

confidence: 59%

The Cretaceous/Tertiary boundary mass extinction in planktic foraminifera at Agost, (Spain)

Molina

Arenillas

Arz

1996

Revue de Micropaléontologie

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“…These Traps have average elevation of 750 m and the thickness of lava pile varies from ϳ200 m to ϳ2000 m (Courtillot et al, 1986). Radiometric dating (K-Ar, Ar-Ar, and Re-Os) of these flows coupled with paleomagnetic data indicate that the bulk of these basalts erupted ϳ65 to 67 Ma ago (Courtillot et al, 1986;Venkatesan et al, 1993;Allegre et al, 1999;Courtillot et al, 1999;Pande, 2002).…”

Section: Hydrogeology Of the Regionmentioning

confidence: 99%

Chemical weathering in the Krishna Basin and Western Ghats of the Deccan Traps, India: Rates of basalt weathering and their controls

Das

Krishnaswami

Sarin

et al. 2005

Geochimica et Cosmochimica Acta

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177

142

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“…Rai (1983) (Fig. 1), were irradiated together with the samples of the Shyok volcanics and were analyzed by 40 Ar-39 Ar step-heating experiment following the procedures outlined by Venkatesan et al (1993) and Bhutani et al (2003) Ar for the lower temperatures up to 1000°C and increase gradually to 50% of sample 40 Ar at 1400°C. The value for the irradiation parameter J is reported with the complete table of release data (Tables 1 and 2).…”

Section: Shyok Volcanicsmentioning

confidence: 99%

40Ar–39Ar dating of volcanic rocks of the Shyok suture zone in north–west trans-Himalaya: Implications for the post-collision evolution of the Shyok suture zone

Bhutani

Pande

Venkatesan

2009

Journal of Asian Earth Sciences

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Did Deccan volcanism pre-date the Cretaceous/Tertiary transition?

Cited by 162 publications

References 21 publications

The Cretaceous/Tertiary boundary mass extinction in planktic foraminifera at Agost, (Spain)

The Cretaceous/Tertiary boundary mass extinction in planktic foraminifera at Agost, (Spain)

Chemical weathering in the Krishna Basin and Western Ghats of the Deccan Traps, India: Rates of basalt weathering and their controls

40Ar–39Ar dating of volcanic rocks of the Shyok suture zone in north–west trans-Himalaya: Implications for the post-collision evolution of the Shyok suture zone

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