Variscan overprint on extensional structure in the Carboniferous
Low-angle inversion footwall-collapse faults are common in Carboniferous basin fault blocks, can be quite well imaged on 2D recce seismic, and have been ignored by generations of interpreters. Variscan inversion structures are readily seen in the Lower Carboniferous when you expect them and look for them. Here we show footwall-collapse modelling creating analogous structures, using our own software DepthCon.
There is no representation of fault systems like this in the picked seismic on UKOGL, and it offers new guidelines in exploring Lower Carboniferous structure potential.