![Just one of many fantastical rocks along this stretch of coast [OC]](https://lemmy.world/pictrs/image/fbf3aee3-0b2b-4f2d-88f4-7651343da4f8.jpeg){kind=link}
Cheswick Sands, Northumberland, UK.
You must log in or register to comment.
Looks like hardened lava flow. Is that what this is?
Nope. Cross-stratification in sandstones. Each curved layer represents an ancient dune or ripple that migrated across a river channel or shallow sea floor.