Archaeological discoveries

What is the code for 39 clues card sandstone city?

Sandstone City Card

*Clue: "When the world is full of troubles, look for light in shadowed doubles."*

Assistant

This clue refers to the mirror image of the word "TROUBLES". When mirrored, this word produces the word "SLUBERTS", which is a variation of the name "SLATE", which is a geological formation associated with sedimentary rock, in this case, sandstone.