Theory on bluish tint of soil and water polution seen on Epstein Island in 3d images possibly due to mining activity.
Why mostly 3d? Might be something to do with low angle photography? I know prisms are used in spectral analysis of even distant planets, so maybe that? But the occurance of these bluish deposits are in well-defined areas like road beds, the tennis court or, I think from intitial excavation at the temple site(see palm tree area), and most importantly the area of suspected mining-and evidence of pollution.
Copper was mined by Cornish miners on nearby island, Virgin Gorda, as well as native islanders. That entire island group were formed by the same geologic processes.