A Dinosaurian ulna from a new locality of Lameta succession, Salbardi area, districts Amravati, Maharashtra and Betul, Madhya Pradesh

摘要

Here we report a dinosaur fossil-bearing locality in Lameta sediments exposed at Salbardi (lat. 21°25′15″N, long. 78°00′00″E), at the boundary of Amravati district, Maharashtra and Betul district, Madhya Pradesh (Figure 1). In the regional set-up, the basement consists of quartz-feldspathic gneiss of Archaean age, over which the Gondwana sediments lie with a sharp boundary. These sediments have been assigned to the early Cretaceous age on the basis of gymnosperm and pteridophytic remains 1,2 . Lameta sediments disconformably overlie the Gondwana rocks and are mainly represented by areno-argillaceous, calc-marl sediments. The Deccan Trap overlying the Lameta beds is mostly melanocratic, massive, fine-grained basalt. However, amygdaloidal structures, occasionally filled with secondary material are developed in a few places. Alluvium and soil make the topmost layers deposited mostly in depressions and low-lying areas. The rocks older than the Deccan Trap are exposed because of fault uplift along a E–W trending fault, namely the Salbaradi Fault.