I beg to differ @Kezo Core samples taken from Bedrock, In Arkansas have been re-analysed as part of a new study into pre ice age industrial activities. A study running parallel to the above found Large Rounded rocks that appear to have been worked by hand. Bedrock samples from the drill cores matched the rock of the Large rounded stones. Further archaeology found what appears to be holes made into the large boulders that some say resemble a doorway with a small rounded window either side. Further digging through this/door or portal has found the remains of a small dinosaur. It is believed to have the remains of a leather collar with a metallic disk (Gold) that seems to have been marked with what looks a letter D
I have a great interest in history and was one of the subjects I took up at school. Also read about what you have mentioned and found it very interesting however, I was refering to the level of industrialisation of the 19th century compared to back in history.
I also came across another article on the same subject…
A recent study found that the metallic disk that looked like a letter “D” from the Eemian interglacial period, symbolized watch out for the hominid “D”ickheads in the interglacial twenty first century ???