Occurrence of Attributes in Original Text
The text related to the cultural heritage 'Nahanni National Park' has mentioned 'Sea' in the following places:
| Occurrence Sentence | Text Source |
|---|---|
| Sediment left by an ancient inland sea 500-200 million years ago had since become pressed into layers of rock. | WIKI |
| These layers were stacked about 6xc2xa0km (3.7xc2xa0mi) deep and are peppered with fossils, remnants of these ancient sea beds. | WIKI |