Lost City of Z found?

Although the above photo looks suspiciously like my previous crop-circley posts, it is entirely of another origin.
National Geographic reports that it belongs to a series of geometric shapes discovered in satellite pictures, and aided by rapid de4forestation..

The newfound shapes are created by a series of trenches about 36 feet (11 meters) wide and several feet deep, with adjacent banks up to 3 feet (1 meter) tall. Straight roads connect many of the earthworks.
Preliminary excavations at one of the sites in 2008 revealed that some of the earthworks were surrounded by low mounds containing domestic ceramics, charcoal, grinding-stone fragments, and other evidence of habitation.
But who built the structures and what functions they served remains a mystery. Ideas range from defensive buildings to ceremonial centers and homes, the study authors say.
It's also possible the structures served different purposes over time, noted William Woods, a geographer and anthropologist at the University of Kansas in Lawrence who was not involved in the research.
"For example," he said, "in Lawrence there's a Masonic temple—it is now a bar. There was a bank—it is now a restaurant called Tellers. These things happen."
What most surprised the research team is that the earthworks appear in both the region's floodplains and the uplands.

Arcahelogically interesting, but not what got my attention.
It is the complex mystery regarding the disappearance of Percy Fawcett, one of my favorite historical figures. It is the unexplored quality – still – of a large part of the Amazon basin. It is the subtle hues of crazy theories and strange legends permeating these stories. It is the unknown.
Remember, when an archaeologist declares that a strange structure is possibly for “burial purposes”, he just does not know. It could be, but then again, it is probably not. It is not a cover-up. It is how things work. A scientist probing into the unknown trying to maintain his professional status will resort to bullshit. It is a historical fact.

These findings are for people who have no professional standing whatsoever, to investigate, correlate, propose strange connections and generally boldly go where no one has gone before. They would probably be wrong all the way, but us fringe freaks generally have no sense of shame.

Instead all this great stuff is wasted on archaeologists.. Oh well.
Besides the disturbing similarity to agro glyphs these formations have, they denote a large force at work over a long period of time. People, or something else? The locals say the Amazon is dreaming..

I mean, really, when a tree falls in the forest without anyone around to hear, does it make a sound?

Nice PDF paper here.