> Millions of square miles of sea floor abutting Indonesian islands, between Australia and New Guinea, and under the South China Sea connecting Korea with Taiwan and Vietnam, off India, and the whole Persian Gulf were lush bottom land that started to vanish under the waves some 20,000 ya. No knowing what might have been constructed on all that, but the oldest cities we know of started right upriver from some of it.
That was the land of Lemuria according to oral history of those peoples.
Anyway the Australians still have oral records of conflicts, and precise negotiated resolutions, as people had to move uphill to where other people had already been living for tens of thousands of years. They were not always welcome.
The water rose continually from 20kya to 8kya, but about 12.8kya, after the comet strike, it rose very fast for a few years, maybe 3m in a decade.
That was the land of Lemuria according to oral history of those peoples.