No pictures at the site. I’ve never heard of ‘the fabled land of Yam’ before.
Strangely - to me - sandstone sounds somewhat like limestone. I would think of it as being soft and amazed that it would preserve hieroglyphics after all this time.
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Shifting desert sands cover and protect many remains of huge dinosaurs in the African deserts
They may have discovered the fabled ancient Land Of Sweet Potato Pie
Tut Tut Tut!