| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | rock art | USA | Considered as historical and archeological sites | 1 |
| 2 | rockfall | United States | Rockfalls are a common hazard in mountainous regions and can pose a threat to hikers and drivers on roads. | 1 |
| 3 | rockfall | United States | Rockfall is a natural hazard commonly associated with mountainous areas and can pose a significant risk to hikers and climbers. | 1 |
| 4 | rockhounding | United States | Popular hobby with dedicated clubs and events | 1 |
| 5 | rockhounding | United States | Many public lands open to rockhounding with proper permits | 1 |
| 6 | rockhounding | United States | Large community of collectors and sellers of minerals and gemstones | 1 |
| 7 | rockhounding | United States | Involves using tools like rock hammers and chisels for extraction | 1 |
| 8 | rockhounding | United States | Common family activity, often passed down through generations | 1 |