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)