Nota de aplicación
Boulders marked with deep, parallel furrows. There is no consensus as to the reason for these grooves, but it is possible that these rocks were used to polish stone tools in prehistoric times, or as timekeeping marks.
Ubicación jerarquía
- Faceta Objetos
- .. comunicación verbal y visual
- .... obras visuales
- ...... obras visuales
- ........ <obras visuales por medio o técnica>
- .......... petroglifo
- ............ marca de cazoleta y anillos
- ............ grooved rocks