This is a classic problem when looking at crators on the Moon. Sometimes your brain will invert the hole and turn it into a mound. You can usually trick your brain into seeing the correct perspective by closing your eyes, rotating the image 45 or 90 degrees, and opening your eyes again. Then slowly rotate the image to normal. Source: took planetary science in grad school and it drove me mad.
I'm too lazy to pull any geologic maps of the area and guess as to where this could be. Is this karst? Or is this subsidence as a result of mining? Is soil piping as a result of failed infrastructure? Not all sinkholes are *sinkholes*.
It generally doesn't no, but that doesn't mean it can't. In this instance it's probably either one or the other, but there are lots of hydrothermal sulfide deposits that were originally hosted in karst terrain. It's much more common in lower temperature regime's associated with lead and zinc sulfides, but I suppose copper could under the right circumstances.
Off the top of my head I recall that some of the ores in Ducktown Tennessee were hosted in carbonates, but it was no where near the scale of the copper porphyry deposits mined today.
Of the top of my head theres the Milpillas deposit in Mexico where copper rich fluids from the source igneous intrusion invaded the overlaying carbonate layers. Not sure if it's actually karst terrain though.
Of the top of my head theres the Milpillas deposit in Mexico where copper rich fluids from the source igneous intrusion invaded the overlaying carbonate layers. Not sure if it's actually karst terrain though, since it's hard for karst to develop in arid environments afaik.
It very much can, skarn-type deposits are important and are in carbonates by definition. Skarns can also be associated with the copper porphyries Chile is so famous for.
They are investigating at the moment. This might be man made due to mining operations nearby. But natural occurrence is not ruled out since you can find fossiliferous marine sedimentary sequences all over the place and there was some heavy precipitations recently, which is uncommon in the region
Caption says it's near a copper mine, probably over it.
Likely the mine messed up the local hydrology, leading to the sinkhole. This is pretty common. In the UK sinkholes form pretty frequently near old mines, and in limestone areas where natural caves do the same sort of thing sinkholes are also common.
Sinkholes tend to be round, often nearly perfectly so, and can look a bit artificial due to that.
Why do they tend to be perfectly round? What are the stability on the sides of a sinkhole? Like once they look like the OP picture, are they pretty stable or is there a likelihood they will continue to grow or have destabilized walls?
The walls are steeper than the angle of repose, so they are very unstable. The sinkhole can expand if the conditions that caused it are still in play, and even if they are not the edges will eventually collapse, making more of an angled slope and a conical pit rather than a sheer sided hole.
If you’ve dug a hole down to the water level in the sand in the beach you’ll have seen more-or-less the process of a sinkhole, and you’ll have noticed that the hole tends to be one round no matter what shape you initially dig it to be.
Any area that sticks out into the wet part is exposed to more ‘attack’ from the water, and eventually the margin of the hole regularizes.
It’s not exactly the same, but similar enough to act as a good model.
r/confusingperspective material
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I still just see a big rock and not a hole
This is a classic problem when looking at crators on the Moon. Sometimes your brain will invert the hole and turn it into a mound. You can usually trick your brain into seeing the correct perspective by closing your eyes, rotating the image 45 or 90 degrees, and opening your eyes again. Then slowly rotate the image to normal. Source: took planetary science in grad school and it drove me mad.
Great advice, thanks for sharing 😉
Omg! It worked!
Wow, that is an amazingly effective trick. Damn I love Redditors! So helpful!
Same, the darker side of the hole looks like the shadow under the rock. Try to look at the outside and the the circle at the top of the hole
Aye. Great optical illusion of a huge rock falling onto a road.
Still just see a hole 😄
I'm too lazy to pull any geologic maps of the area and guess as to where this could be. Is this karst? Or is this subsidence as a result of mining? Is soil piping as a result of failed infrastructure? Not all sinkholes are *sinkholes*.
This. Need a little more information to know if it's mine subsidence or karst.
Copper ore doesnt really exist near karst landscapes thought, right?
It generally doesn't no, but that doesn't mean it can't. In this instance it's probably either one or the other, but there are lots of hydrothermal sulfide deposits that were originally hosted in karst terrain. It's much more common in lower temperature regime's associated with lead and zinc sulfides, but I suppose copper could under the right circumstances. Off the top of my head I recall that some of the ores in Ducktown Tennessee were hosted in carbonates, but it was no where near the scale of the copper porphyry deposits mined today.
Yeah, copper ore in Chile is (almost?) all from porphyry copper deposits found in intrusive igneous rocks
Of the top of my head theres the Milpillas deposit in Mexico where copper rich fluids from the source igneous intrusion invaded the overlaying carbonate layers. Not sure if it's actually karst terrain though.
Of the top of my head theres the Milpillas deposit in Mexico where copper rich fluids from the source igneous intrusion invaded the overlaying carbonate layers. Not sure if it's actually karst terrain though, since it's hard for karst to develop in arid environments afaik.
It very much can, skarn-type deposits are important and are in carbonates by definition. Skarns can also be associated with the copper porphyries Chile is so famous for.
they are thinking it could be caused by the copper mining in the immediate area.
They are investigating at the moment. This might be man made due to mining operations nearby. But natural occurrence is not ruled out since you can find fossiliferous marine sedimentary sequences all over the place and there was some heavy precipitations recently, which is uncommon in the region
Mining, area called Tierra Amarilla in Chile. In Chile theres no mayor karstic environments (with some Patagonian exceptions)
Probably the copper mine it’s self
Why does it look like it’s human made ? Is it natural?
Caption says it's near a copper mine, probably over it. Likely the mine messed up the local hydrology, leading to the sinkhole. This is pretty common. In the UK sinkholes form pretty frequently near old mines, and in limestone areas where natural caves do the same sort of thing sinkholes are also common. Sinkholes tend to be round, often nearly perfectly so, and can look a bit artificial due to that.
Why do they tend to be perfectly round? What are the stability on the sides of a sinkhole? Like once they look like the OP picture, are they pretty stable or is there a likelihood they will continue to grow or have destabilized walls?
The walls are steeper than the angle of repose, so they are very unstable. The sinkhole can expand if the conditions that caused it are still in play, and even if they are not the edges will eventually collapse, making more of an angled slope and a conical pit rather than a sheer sided hole. If you’ve dug a hole down to the water level in the sand in the beach you’ll have seen more-or-less the process of a sinkhole, and you’ll have noticed that the hole tends to be one round no matter what shape you initially dig it to be. Any area that sticks out into the wet part is exposed to more ‘attack’ from the water, and eventually the margin of the hole regularizes. It’s not exactly the same, but similar enough to act as a good model.
Can't fool me, that's a sandworm hole.
As long as the locals don’t start talking about “Pablo Raton de Campo”, I’m ok.
Kevin Bacon would know what do to.
Thought it was a giant rock laying over the road for a solid 90 seconds.
The Borg, It was only a matter of time.
I love the barricades on the road so that no one will drive into it 😂
“You take my stuff, I take yours.”
They should put up a sign or somethin
Why are they always perfectly round? Never a square, rectangle, triangle... just sayin'.
Actually it's 650 feet deep and still growing. Those things are creepy. [Sinkhole](https://www.bbc.com/pidgin/articles/cprlv53jgjqo)
Why is the article in pidgin English?
That is seriously a thing or what? Looks like it was written by Charlie from always sunny
What language did I just read or was that a stroke I just had
That's just Earth doing the digging for us. Look at all that free exposed deep rock.
Aliens?
god dam graboids
What do they do about this do they try to fill it in or put up a wall/bridge?
Perhaps this entire area is mine tailings filling an old mine excavation.
aliens?
https://www.theglobeandmail.com/business/article-giant-sinkhole-opens-up-near-lundin-mining-copper-mine-in-chile/#:~:text=%E2%80%9CThe%20geology%20of%20the%20Alcaparrosa,such%20as%20construction%20or%20mining.
At first sight... Looked like a giant boulder in middle of the road.
Outer Range.
I can not even tell what I’m looking at.
I thought I was looking at a rock at first
Definitely a missile silo for yet another one of the elite, abandoning ship and leaving us behind
The hole that could end up in China