Strange shapes in the Amazon forest

From the Journal of science and news, experts from United Kingdom and Brazil have discovered what they believe is evidence that the Amazon zone in western Brazil are not pristine.  Before the arrivals of Europeans, this area was known to have been deforested to a certain extent in order to produce large geo-glyphs patterns on the ground.  These 450 geometrical shapes that was discovered has baffled some of the archaeologist.  There was only a few artifacts found from some of the excavation and based on the current knowledge, they believe it might’ve been a gathering place for ritual purposes.

All four of the shapes are within a 13,000 km² area and thought to be untouched by civilization.  Because of current human encroachment, the discoveries of the geometrical shapes were found.  One archaeologist Ms. Watling is concerned with two questions.  One is how much of an impact did it make when these sheets were formed?  The second question posed is – was the area already a jungle forest when these were built?

From the first question, they did try to answer it by building a computer model that reconstructed historical fire and vegetation that goes back several thousand years.  The computer model focused on two areas of geo-glyphs and the results were that the deforestation was very minimal and only temporary.  This means that they did not do large-scale burning for example, for the purpose of agriculture or even for these interesting geo-glyphs shapes.

The conclusion is perhaps, they certain types of species of trees because there was a market for them during that time.  This means that the force back then might’ve looked different in terms of biodiversity than what we have today because there are some species that did not make it through to our time because they were harvested long ago.  The archaeologist warns that this practice did not hold true in other areas and also it was done at a very slow rate.  This not hold suggestions that it gives the right to remove current vegetation because it was done back then, it was just done very slow giving time for the forest to recover.  This is much different than what we do today as things get harvested very fast and the areas needed are much larger.