Discussion on 'Tectonic and environmental controls on Palaeozoic fluvial environments: reassessing the impacts of early land plants on sedimentation' Journal of the Geological Society, London - Davies,NS; Gibling,MR; McMahon,WJ; Slater,BJ; Long,DGF; Bashforth,AR; Berry,CM; Falcon-Lang,HJ; Gupta,S; Rygel,MC; Wellman,CH (JOURNAL OF THE GEOLOGICAL SOCIETY, 2017)