It is not clear if the surface drainage network line dataset is based on the “unfiltered” or “simplified” data shown in Figure 2.
The link between interpreted faults and fluid or gas escape features is a key feature of this figure. The map differentiates between “BaseCambrian seismic faults”, Post-Wilton “Strike-slip” and “Reverse” faults, and “FAULTS”. The categorization is not adequately explained (e.g. what differentiates “FAULT” from a “BaseCambrianSeismic fault”?).