Child birth stone（Tochigi Prefecture）
By Takashi
This page which is based on the information from 'THE UNIVERSE(THE SKY)=SORA' is made by HONO who is one of the fellows of THE UNIVERSE(THE SKY)=SORA.
http://sora.ishikami.jp/image_dir/index.php?id=20040709204904
http://sora.ishikami.jp/image_dir/images/2004/20040709204904.jpg
Round rocks come to be born from the rock.
It is said the round stones are made by being scraped off by water.
However here and there, there are round stones which were made by being pushed out from the megalith and the parts which were pushed out came to be recessed.
http://slicer93.mbsrv.net/88-1033.html