Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Nahanni National Park' has mentioned 'Ice Age' in the following places:
Occurrence Sentence Text Source
While previous ice ages affected the park area, the most recent, the Wisconsin Ice Age (85,000-10,000 years ago) touched only the most western and eastern parts of the park.
This process takes a great deal of time, and it is believed that the mounds themselves are around 10,000 years old, their creation beginning at the end of the last ice age.