That’s very possible. On second look there are a few materials that seem more set into the ground. However even the plant growth over them still might fit a time period that includes this currenr spring and last spring. (Assuming this isn’t Australia or anything.) But it could be a favorite dump site for some slumlord in the area.

Also, I have seen garbage piles with moss because the landlord had scraped everything out of a property and dumped it into a ravine. Moss and other plants could easily come with the dump too. But it’s also on netting material which is great for rapid moss growth. But more than one dump is very plausible.