小田切さんが発見した石。コーン・イン・コーン構造という珍しい構造を持った石
The Asahi Shimbun
Two years ago, a girl picked up a strange stone during a school trip. The stone was found to be a rare stone with a special shape called “cone-in-cone.” It is only the second time such a stone has been found in Japan. A paper about the stone was published in a science magazine.
Mana Odagiri was a s...