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The oldest hominids on record are about 7 million years old.  However, they were creatures as closely related to apes as they are to humans & not capable of making an advanced civilization.  There have been several branches from the hominid tree, but the only one still in existence is homo sapiens.  About 300,000 years ago homo sapiens branched from the hominid tree and were so successful that that is all that exists now.  They out-competed everyone else.  So if there was an advanced civilization, by our standards, it would have to be 300k years old or less.  300k years is nothing, nada, in geologic terms.  Any advanced civilization less than 300k years would have left major evidence that we would see today.

I'm not buying OP's thesis, but I will keep my mind open just in case.

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The oldest hominids on record are about 7 million years old.  However, they were creatures as closely related to apes as they are to humans & not capable of making an advanced civilization.  There have been several branches from the hominid tree, but the only one still in existence is homo sapiens.  About 300,000 years ago homo sapiens branched from the hominid tree and were so successful that that is all that exists now.  They out-competed everyone else.  So if there was an advanced civilization, by our standards, it would have to be 300k years old or less.  300k years is nothing, nada, in geologic terms.  Any advanced civilization less than 300k years would have left major evidence that we would see today.

I'm not buying OP's thesis, but I will keep my mind open just in case.

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You believe humans evolved from apes?

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Basically it really looks like a nuclear war since we
really don't know of a natural process that can do
that. A nuclear war as a possibility is off the table
so lets just guess. Really current science process fails in
areas like this since it opens so many doors. Evolutionary
theory and Religion suddenly would have to make major
changes. Plus every crackpot  could make a new grand story
of everything. Who we are, how we should live, and who to
hate. Could just be natural but science has to proceed with a set
of possibilities off the table which complicates research. What
if some details look like they confirm the nuke war hypothesis.
Well those details have to be ignored even if eventually they
instead confirm the opposite.

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That's one of the issues. If the previous industrial society was operating in a different ecology, would the resulting metals have impurities at all?

Take a look at Jurassic Park, the scene where the Triceratops is down and being examined - because as the script and book both relate, it's lung tissue capacity is insufficient for earth's current atmospheric pressure of 14.5 psi. It's postulated that before a certain time when dinosaurs roamed the earth that a heavy overmantle existed in the troposphere or higher which largely contained ice and the result was that i sheltered earth from a number exterior radiological contaminants while maintaining air pressures of 30+ psi.

Then the Flood came, in which the "fountains of the deep" expulsed a high amount of - ? Consider the meteor which created the Yucatan impact - coming thru said mantle and opening it up to sudden depressurization, melting, and the resulting impact of millions of acre feet of water raining down on earth. For the most part, filling the oceans while also sweeping away a great deal of life and burying it under the waters.

Mt Saint Helens have been an interesting case in seeing the results and the highly accelerated development of what happens - coal, and oil.

There are already artifacts recovered and considered "anomalies" where metal objects are found made of almost pure isotopes which when dated are almost impossible to determine, but which the circumstances etc relate at least 10-15,000 years ago - and yet suffer little to no corrosion. That they were found at all in that strata is unexplainable, normal objects we make today won't last months in the same circumstances. If anything, bog iron does better - the original forged into "wrought" iron that has a fibrous content and which will always stretch rather than break.

While the paper proposes to discover traces of early industrial civilization we currently ignore or even cover it up - why the channels that would contain some kind of fluid in South America - installed upside down? As if they were not subject to gravity?

What we limit ourselves in researching these items is a tightly controlled and limited focus on how they relate to the physics we see around us now - rather than the physics others might have used to create them in the first place. If you can control the polarization of ion to make a gravity well and then use it to propel yourself thru the 3 D's as we know them, why can't you also create pure isotopes where the crystalline matrix is uncompromised by earthly inclusions? If the mantle did collapse and washed away previous civilization, then according to what previous land contours and coastlines would it have existed before, and deposited into?

We have all sorts of projections of what coastlines would look like if the seas rose, take enough water out of them to create a pressure vessel 350 miles up to contain our atmosphere, what would the globe look like then? With that picture, the put the continental plates back into their original configuration, and you might have some more discrete locations to search.

You may well find Atlantis. And, given the intent of the Flood, you may well regret what you find. What has been seen can't be unseen, same as the pyramids in Mexico where humans were sacrificed to satisfy belligerent gods.

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radioactive isotopes
alloys
ceramics
organics (plastics)

All of those would have been found in a mine by now.

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Given my explanation, a coal mine. And anomalies are, but todays Junk Science represses them.  

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Junk science

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10 mm sockets

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Okay, now you're just handwaving like those conveniently undetectable ancient African & native American super-state theories.

Not much different than the fundies' "God made the Earth & universe /look/ exactly like they would if they were billions of years old, and made sure there's no way to ever prove it!"

Unfalsifiable theories are fantasy.

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Would that be the case of the 1"x1"x1" cube of stainless steel found in coal in a mine way back before calibration blocks came into use?  Or the coal with fossils that included a modern shoeprint that included mechanical stitching on the soles?

If not a previous civilization I'd say signs of time travel.

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We have identical high technology stone structures placed across the known world of an unknown origin. The ancient civilizations that are credited are simply the squatters who inherited the land from the original creators. No idea who actually made them, they are all made the same, and have features and details that are past our current knowledge of stonework.

There are thousand-ton rocks with scoops out of them like they were ice cream, with the stone having a small raised 'bump' at the end of the scoop just like the extra matter you get in a pint of vanilla after running a spoon through it. At one point we knew how to liquify/soften stone matter so that it could be manipulated to our liking.

I can't wait to hear what's underneath the ice in Greenland and Antarctica.

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Given the amount of shared DNA, I believe apes and modern humans shared common ancestors.  I'm not sure I would call the common ancestors apes or not.

Look at the fossil record of homo erectus and other early hominids.  There's a lot of common physiology as well.

<----not an archaeologist but knows a lot about it, and is an expert in the earth-sciences.

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Sometimes I wonder how many reboots and possible advanced civilizations there have been on Earth before us.

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There's a lot we don't know about pre-history.

Up until a few years ago, the ancient Finnish Empire was considered a myth, but these days we know better.

https://i.imgur.com/bFPbqsr.jpg

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The Sphinx is carved out of bedrock.

Bedrock is pretty old.

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We don't know shit about fuck.

We think we know everything, but that's our own ego.

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Post details of rocky road ice cream scoops.

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https://i.pinimg.com/originals/35/40/27/3540275c425647ceb30070223ecac71f.jpg

https://tinfoilhatlady.files.wordpress.com/2014/05/20130421_104101.jpg?w=1000

This kind of stuff. There are lots of videos/pics of this exact technique across the world.

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I understand why the scientifically illiterate might think it could be something else. But it really can't be.

https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.hou.usra.edu/meetings/lpsc2015/pdf/2660.pdf&ved=2ahUKEwjO9Lvj2PzpAhUCSq0KHQ9LD5gQFjAJegQIARAB&usg=AOvVaw0pPt56sdAiqNd1v9mphTsC

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I can't wait to hear what's underneath the ice in Greenland and Antarctica.

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https://i.pinimg.com/originals/35/40/27/3540275c425647ceb30070223ecac71f.jpg

https://tinfoilhatlady.files.wordpress.com/2014/05/20130421_104101.jpg?w=1000

This kind of stuff. There are lots of videos/pics of this exact technique across the world.

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it is supposed to be beyond those civilization's knowledge of stonework when they made that stonework.

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What about out of place artifacts like the London Hammer and springs etc. Inside rocks?

There really can't be any other explanation.

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I believe there is a chance a civilization more advanced than we give credit for (think Iron Age) may have been around thousands of years prior to what we currently document.

The consistency in architecture (stone blocks) between different continents is staggering.  There was contact between ancient people.  We can't figure out how they made certain stone structures, yet multiple civilizations thousands of miles apart independently developed the same method?  Okay.

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I like the example of Troy, it was a myth, till someone found it.    Even now we are finding traces of civilization we didn't know existed or their extent through LIDAR and such tech.

I have always wondered where Rome would be if it hadn't collapsed and survived till now?

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https://i.pinimg.com/originals/35/40/27/3540275c425647ceb30070223ecac71f.jpg

https://tinfoilhatlady.files.wordpress.com/2014/05/20130421_104101.jpg?w=1000

This kind of stuff. There are lots of videos/pics of this exact technique across the world.

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How is that inconsistent with ancient stone carving technologies and the effects of weathering?

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I like the example of Troy, it was a myth, till someone found it.    Even now we are finding traces of civilization we didn't know existed or their extent through LIDAR and such tech.

I have always wondered where Rome would be if it hadn't collapsed and survived till now?