A turtle, toad, or frog supports the earth (sky) or is its embodiment
Water is the original element, the dry earth appears later
Original earth was small and later increased in size or the fertile soil grew from a small amount of original substance
There are two women in the beginning of time, an old and a young one. One or both conceive in a supernatural way. A son or twins are born, they establish natural order and social rules
A woman who is pregnant or has a small child falls from the sky. She or a daughter born by her dies but her (grand)son is grown up