https://www.pnas.org/doi/full/10.1073/pnas.2312008121
It contains a lot of diagrams of the wall (fig. 2 and 3), as well as an extensive discussion about whether it could have been produced by natural phenomena (heading "Natural Processes as Origin of the Blinkerwall"). The concluding paragraph of that section:
> Taken together, the aspects discussed above do not ultimately rule out a natural process as the genetic origin of the Blinkerwall. However, for each of the different processes, several unresolved questions remain. We consider a shoreline influenced by drifting ice as least unlikely, whereas eskers, moraines, and tsunami deposits appear highly implausible. Finally, there is one observation that cannot be explained by natural processes at all, and which pointed us toward a possible anthropogenic origin of the structure. This is the preferential location of the largest and heaviest stones at knickpoints along the 971-m-long Blinkerwall.