3 ms·
This looks like it could have been caused by water penetrating a softer substance, causing it to harden, and then the surrounding material was removed by erosio
by Uily 5y ago
This looks like it could have been caused by water penetrating a softer substance, causing it to harden, and then the surrounding material was removed by erosion.
- senectus1 5y agostill very cool but yeah I doubt its a biological.