There has been some disagreement between Medlicott and Matley as regards the stratigraphy of the Lameta-Jabalpur contact in the type area. On the basis of fieid evidences integrated with petrologic data, it is shown in the present work that there is a well-marked unconformity at this contact, and the paraconformity observed in the eastern part actually passes into an erosional unconformity of a greater magnitude towards the south-west. The "apparent presumption of an unconformity" by Medlicott is thus confirmed. Post-Jabalpur tectonism, visualised on the basis of this presumption of the unconformity, although a cause for Lameta sedimentation, did not effectively change the tectonic framework in the type area.