deltica is incorrectly written, and should be written as "deltica" as meaning:
deltica of deltaUn delta is a landform at the mouth of a river formed by river sediments that are deposited there. Deposits of the deltas of large rivers are characterized by the fact that the river is divided into multiple arms that are separating and returning together to form a cluster of active and inactive channels.Most famous delta is that of the Nile River, and is where item is the name that is called this type of mouth. The mouth of the Nile stretches over a sharply triangular region, which is very similar to the shape of the Greek letter delta ( ) reason by which the historian Herodotus gave him that name.
