As the Yonaguni Monument (also underwater pyramids at Yonaguni ) famous rock formations located in the extreme southwest of Japan, near the island of Yonaguni in the East China Sea , not far from more than 100 km from Taiwan. Their origin is among archaeologists and geologists controversial.
The area encompasses approximately 5 square kilometers and lies since the end of the last ice age about 8,000 years ago under the sea. In 5 to 30 meters depth is the rock formation about 200 meters long and 150 meters wide. Since the formations have relatively precise proportions and edges, it is debatable whether they are geologically formed, or whether it is human made structures.In 1985, the Japanese divers Kihachiro Aratake journey to search for new dive sites for tourists strange rock formations. After a closer look, he believed that the stone structure had been modified by human hands. The accurate and precise edge angle indicated his view out.
Following the general doctrine, there is an erosion platform , which was created when the band was still within the surf zone. With the end of the Ice Age, when sea levels rose again, it was then flooded and thus got its present appearance. The geologist Wolf Wichmann has studied the formation in several dives and came to the conclusion that it is a natural phenomenon. According to Wichmann run along all the walls and terraces, natural weak points in the rock can thus be explained by erosion. Robert M. Schoch, a geologist at Boston University , also believes in a natural origin, but considers human editing was possible.
According to some archaeologists and geologists could be the remains of a cultural act, during the last ice age, lived in the southwest of Japan. They rely primarily on the straight lines and precise angles, which could not be more natural in origin and targeted treatment by the people as a declaration made necessary. In addition, holes would find in the formation, which could be interpreted as column bases. Masaaki Kimura , a marine geologist from the Ryukyu University ,, it is, a natural rock formation that has been processed just over 2,000 years of human beings.
Since the formation is from the end of the Ice Age by water, an anthropogenic origin would mean that the uplifting culture would have existed around 8,000 to 10,000 years ago. This is in contradiction with the generally accepted theory of civilization. On the Japanese islands, it has only simple ceramics from this period of culture Jōmon found.