Atlant is described in contact 70 as an Jschwjsch who was married to an Jschrjsch named Karyatide. Under the leadership of Atlant, the continent of Atlantis was expanded and made habitable. While under the command of his wife Karyatide, Lesser Atlantis came into existence. Atlantis the civilization, seemingly appears to have been named after Atlant.
They built huge cities on each of the two separate continents (Described in contact 55 as North/South America and Europe/Africa). For thousands of years they lived in friendship and peace, until a few scientists (see Arus) were again overcome by the old thirst for might and power, and tried to seize the government. But having tired of wars, the nations rose up against them, and they occupied spaceships (see Beamships) and fled into cosmic space; that being some 15,000 years ago in Earth chronology. While contact 70 describes this as occurring 115,000 years ago.
The events are described in contact 70 as taking place "before an upset of the Earth shifted its axis".