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An ancient cataclysm of such magnitude that the Sun would melt stone in this manner seems like a good reason to go underground.

An ancient cataclysm of such magnitude that the Sun would melt stone in this manner seems like a good reason to go underground.

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[–] • 1 pt (edited )

"It's clearly not normal erosion"

Except it clearly IS normal erosion. The center is eroded while the sides are not. Why would the center of the steps melt while the side remain intact? It's probably sandstone that was not very hard to begin with.

Although its resistance to weathering varies, sandstone is easy to work...some types that have been used in the past, such as the Collyhurst sandstone used in North West England, have had poor long-term weather resistance, necessitating repair and replacement in older buildings

These sandstone canyons in Arizona look melted too: https://upload.wikimedia.org/wikipedia/commons/thumb/9/97/Lower_antelope_2_md.jpg/800px-Lower_antelope_2_md.jpg

[–] • 0 pt

Great points. What i was thinking was that it might have been a flash of great heat, and that is why the sides are not melted. As the light didnt reach. Up the walls.