The Crucible Desert rests in the center of Jericho. Spanning from the Earstern coast to the Syruiga mountain range. The geography of the desert was created when a massive asteroid collided with the planet millions of years ago leaving a dent in the landscape. The impact also shifted Dylaera's orbital position downwards enough that the equator moved almost 1000km north along with slowing the rotation changing the day into 26 hours long. Overtime the divet was overcome by a sea of sand, nothing remaining but spires of stone where large chuncks of debris landed and burried themselves.
The southern part of the continent.
The Marrows are a stretch of desert bordered on both sides by a mountain chain.