16

As the other answer suggests, these are sonar surveys of the ocean depths. But the answer is a bit more complicated. The vast majority of the ocean floor has never been mapped. We really only know about the water depth because the water above the sea floor is lighter than if it were rocks. So a deep ocean produces less gravity than a shallow one. And, ...


11

Supplementing Wolfgang's answer, here's a National Oceanographic and Atmospheric Administration story that talks about the appearance of ocean-bottom artifacts: With legions of people around the world now exploring the seafloor, many are noticing locations along the ocean bottom marked by mysterious formations of grid-like artifacts. These formations ...


10

My Rand-McNally Atlas shows the signature for lava fields in that area. The elevations in Google Maps indicate concentric contour lines with only small differences in elevation, rising from 600m at the outer perimeter to 700m in its center. This a shallow cone-shaped formation. Best I can tell from Wikipedia (compare the picture there), this feature is: ...


8

I can engage in some educated speculation about what you think you see, but I'm confident you were fooled by the shadows in the image, which are caused by a low sun angle and distorted by the terrain. These are not inuksuit (which is the correct plural of inuksuk). They are all natural, not man-made. Let's point out a few things we know and can see on the ...


4

The orange lakes are most likely tailing dams, also known as tailings storing facilities given that they located near an open pit iron ore mine. Once iron ore has been mined it is usually sent to a processing plant to increase the grade (amount) of iron in the product the mine exports. It does this by removing as much waste material as possible. Sometimes ...


1

Your "Inuksuk" is simply a lucky combination of the sun's angle grazing an erosional remnant of the adjacent riverbank. If you go upriver, you'll see the same erosional remnant, now with sunlight at a perpendicular angle....not so mysterious, right? Far more curious, to me at least, is why the riverbank has been incised in such a way. I suspect ...


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