Did you know that the marble used for wall materials of a long-established department store in Nihonbashi (Mitsukoshi Main Store, Takashimaya) contains many fossils from the dinosaur era, such as ammonites and Belem Night hundreds of millions of years ago? It seems that there are about 13,000 ammonite fossils in Nihonbashi Mitsukoshi alone. In particular, on the walls of the stairs leading to the second floor of the central hall on the first floor of the main building, there are fossils that clearly show the appearance of ammonites.
The marble of these department stores is from Italy, and the Alps and the area at the time when Ammonite was alive were deep seas, and it is thought that calcified mud accumulated there and the remains of ammonite were mixed in It seems that
By the way, the definition of "fossil" is as follows (it does not necessarily mean "stone")
1.It is naturally buried underground and not buried by humans.
2.It has been more than 10,000 years since it was buried underground
Why don't you enjoy so-called "fossil watching", where you look around the wall materials in the store carefully? Also, I think it will be a free study for children during summer vacation. Even if you can't find it, if you ask at the department store information desk, you can kindly tell me the place.