Structural Framework of Deolapar Area, Central India and its Implications for Proterozoic Nappe Tectonics: Comment*

What is it about?

Deolapar area has attracted attention of Precambrian geologists of India for report of a nappe structure by West (1936), mainly on the basis of stratigraphic omissions and inversions in the Sausar Group. In a recently published paper Chattopadhyay et al. (2003) have tried to solve the problem of nappe controversy by remapping the area around Deolapar. However, when we compare the map published by West (1936) on a scale larger than that of Chattopadhyay et al. (2003), it becomes clear that some of the metasedimentary units (Chorbaoli Formation and Junewani Formation) mapped by West (1936) show westward closures between Kadbikhera and Khapa, but these have been regrouped as Tirodi Gneiss by Chattopadhyay et al. (2003) without any closures. No explanation is available for this change. In addition, the paper by Chattopadhyay et al. (2003) has the following lacunae, which require clarification. Evidence of Thrusting Evidence for Unconformable Relation Folded Thrust Interpretation of the Map Sausar Belt as Mesoproterozoic Fold Belt

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