Geological / environmental event
Soridea island forms in the Alia region as a consequence of the convergence between the Proatlantis and Proosiric plates. Pressure over the Soridean hotpot fractures the tips of the two plates, forming two new minor plates that will be the basis for the Alia region. Their convergence gives rise to the mountains that elevates Soridea from the Osiric ocean, while the whole region keeps slowly drifting westward to meet the boundaries of the Alian ocean.