from this site, I took one piece of sandstone back, into my
collection.

.Senjo-jiki Rock Tableland
This is a place of scenic beauty where large base
rocks spread in the shape of a slope which reminds us of a large
rock floor. The large base rocks are consisted of white soft
sandstones, showing its magnificent scenery created by the erosion
of washing wild wave. Also, it is known for its beauty of the view
of the setting sun.