Occurrence of Attributes in Original Text
The text related to the cultural heritage 'Rock Drawings in Valcamonica' has mentioned 'Bedrock' in the following places:
| Occurrence Sentence | Text Source |
|---|---|
| The vast majority of the petroglyphs are made on subglacially streamlined bedrock and glacial erratic surfaces revealed as the last glacier to form the valley retreated approximately 15,000 years ago. | WIKI |