The Great Flat

Sicily collided with the now re-emerged Calabria. Sicily had also collided with Africa, forming a bridge between Tunisia and Italy. A second bridge has also appeared between Gibraltar and Morocco. These bridges formed earlier on in the Calidocene but they were covered by the rising sea levels and were eventually revealed once the sea levels dropped in the boundary between the Calidocene and Ariducene.

The western half of the Mediterranean had evaporated, with only a few small pools remaining. The leftover salt was deposited on the ground and became a huge field of salt stretching out for miles. Some islands in the western mediterranean provided an isolated refuge for life coming from the harsh salt flats. The Great Flat has the lowest elevation on earth during the Ariducene. 

From the Sahara, harsh winds blow sand into the Great flat. The sands and the winds erode salt crystals and leave behind shifting salt dunes mixed in with sand. In the case of rain, the dunes dissolve and resolidify into fully solid plains of salt, restarting the cycle of erosion and resolidification. The sands left behind by the winds are usually buried under the salt, but under the right conditions, they turn into new forms of desert glass. The beating sun on the fields of dead Seawort in the Calidocene-Ariducene boundary started massive brushfires that left behind soda ash. This soda ash and even more brushfires led to the sands turning into small black and yellow glass crystals that roll along the dunes. Furthermore, meteorite impacts leave behind large crystals of black salt and yellow glass scattered around the impact craters.