Vivek S. Kale, Himanshu. C. Kulkarni & V. V. Peshwa write: The erstwhile tripartite classification of the Deccan Trap volcanic province of India (Krishnan 1982), which presumed its westward younging, is now being questioned on the basis of new palaeontological, palaeomagnetic and radiometric data (Sahni & Bajpai 1988). It is now being replaced by the emerging concept of its chemical stratigraphy (e.g. Sreenivasa Rao et al. 1985; Cox & Hawkesworth 1985; Beane et al. 1986; Devey & Lightfoot 1986; Bodas et al. 1988). Elaborating upon an earlier version by Mitchell & Cox (1988), the paper by Mitchell & Widdowson (1991) proposes the extension of the (chemical) ‘Formations’ from the Ghat-sections to the southern parts of this volcanic province. We question the validity of such long distance correlation of the chemical ‘Formations’ because they fall short of satisfying the fundamental tenets of lithostratigraphic classification and correlation.

Krishnan 1982). However, in most cases the lateral

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