Occurrence of Attributes in Original Text
The text related to the cultural heritage 'Ogasawara Islands' has mentioned 'Volcanic' in the following places:
| Occurrence Sentence | Text Source |
|---|---|
| In November 2013, a new volcanic island formed offshore from Nishinoshima and eventually merged with Nishinoshima, enlarging it. | WIKI |
| The crust of the Ogasawara Islands was formed by volcanic activity when subduction began 45xe2x80x9350 million years ago, and is composed mostly of an andesitic volcanic rock called boninite, which is rich in magnesium oxide, chromium, and silicon dioxide. | WIKI |