The influence of Deccan volcanism on climate: insights from lacustrine intertrappean deposits, Anjar, western India

Atmospheric halogen and acid rains during the main phase of Deccan eruptions: Magnetic and mineral evidence

“…At the time of Deccan phase 2 volcanism, India was a large island in the southern part of the Tethys Ocean located at ~21°S. Climate was relatively warm and humid, but arid close to the Deccan volcanic province as a result of "mock aridity" (e.g., volcanically induced conditions and extreme geochemical alkalinity; Khadkikar et al, 1999;Gertsch et al, 2011;Keller et al, 2012). Therefore, a large proportion of the released gases would have been transported into the high atmosphere (Kaminski et al, 2011) rather than scavenged locally by rains.…”

Barium anomaly preceding K/T boundary: possible causes and implications on end Cretaceous events of K/T sections in Cauvery basin (India), Israel, NE-Mexico and Guatemala

“…However, as the Ir anomalies occur in intertrappean beds, it is inferred that Deccan volcanism predates meteoritic impact (Venkatesan et al 1993;Bhandari et al 1993;Khadkikar et al 1999). In view of the enormity of Deccan volcanism (Glasby and Kunzendorf 1996) and its proximity to the study area, it could be assumed that it would have influenced the sediments of the study area more readily than the meteoritic impact in the Gulf of Mexico region.…”

“…Typical KTB sediments contain Ir anomalies demonstrating their apparent synchronicity with the Chicxulub meteorite impact. In India, Ir anomalies are linked to the supply by Deccan volcanism (Bhandari et al 1995) for the recorded occurrence in intertrappean clayey sediments (Anjar region of central India- Khadkikar et al 1999) or in Kallamedu Formation of the Cauvery basin. The clay layer is considered to have been formed by weathering of volcanic ash and glass (Hansen and Mohabay 2000).…”

87Sr/86Sr anomalies in Late Cretaceous-Early Tertiary strata of the Cauvery basin, south India: Constraints on nature and rate of environmental changes across K-T boundary

“…The studies of Keller (2008bKeller ( , 2009b) that followed multidisciplinary approach to document bio, litho, magnetostratigraphic, mineralogic, and sedimentological data of KTB of Krishna-Godavari basin and stratigraphic records of Jhilmili area of Madhya Pradesh, India respectively, suggested that significant part of Deccan volcanism itself might have ended prior to perceived KTB. Predating of Deccan volcanism has been suggested by few other authors too (Venkatesan et al 1993;Bhandari et al 1993a;Khadkikar et al 1999).…”

“…In India, Ir anomalies are linked to the Deccan volcanism (Pandey 1990;Bhandari et al 1993aBhandari et al , 1993bBhandari et al , 1994Bhandari et al , 1995 especially for those recorded in intertrappean clayey sediments (Anjar region of Central India - Khadkikar et al 1999;Shrivastava and Ahamad 2005) and for the suspected occurrence of Ir anomaly in the Kallamedu Formation of the Cauvery basin. The clay layers in intertrappean deposits and in the Kallamdeu Formation are presumed to have been formed by weathering of volcanic ash and glass (Hansen and Mohabay 2000).…”