Occurrence of Attributes in Original Text
The text related to the cultural heritage 'Ha Long Bay' has mentioned 'Cambrian' in the following places:
| Occurrence Sentence | Text Source |
|---|---|
| Date Geologic period Events 570,000,000xe2x80x93500,000,000 BC beginning of the Cambrian Period The area, which now forms Ha Long Bay, was basically mainland, subject to a process of rain erosion. | WIKI |
| end of the Cambrian Period The area was flooded, commencing the existence of Ha Long Bay. | WIKI |