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Tattapani Complex: a New formation at the Base of Simla Group, Himachal Pradesh
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Variation in Tectono-Stratigraphic levels of the Sundernagar volcanics/Mandi-Darla volcanics has been soliciting a logical causative - either stratigraphic or tectonic. This communication explains the observed variation to be a reflection of actual stratigraphic separation between two sequences.
Based on field evidences and geochemical characteristics, two distinct magmatic episodes are established within the Shall-Simla sequences of Himachal Pradesh. The two magmatic episodes are formally identified as 'Mandi Complex' and 'Tattapani Complex' (generally referred to as Sundernagar volcanics/Mandi-Darla volcanics) - the former being Pre-Shali and the latter Post-Shali/pre-Simla.
A modified stratigraphy of the area, as per the Code of stratigraphic nomenclature of India has been proposed.
Keywords
Shali Stratigraphy, Igneous Geochemistry, Tattapani Complex, Himachal Pradesh.
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