Dried out by heat or excessive exposure to sunlight:
— A vast desert all adust.

synonyms: baked, parched, scorched, sunbaked.

Roget 340: dry, anhydrous, arid; adust^†, arescent^†; dried etc. v.; undamped; juiceless^†, sapless; sear; husky; rainless, without rain, fine; dry as a bone, dry as dust, dry as a stick, dry as a mummy, dry as a biscuit.    water proof, water tight.    dehydrated, dessicated.    ... show more

Roget 384: heated etc. v.; molten, sodden; r_echauff_e; heating etc. v.; adust^†.    inflammable, combustible; diathermal^†, diathermanous^†; burnt etc. v.; volcanic, radioactive.    ... show more

Burned brown by the sun.