noun, plural al·lu·vi·ums, al·lu·vi·a [uh-loo-vee-uh] /əˈlu vi ə/.
Examples from the Web for alluvia
We see clearly the alluvia of two streams converging from right and left, and uniting to pass to the sea through Brading Harbour.The Geological Story of the Isle of Wight|J. Cecil Hughes
It was only in the extra-glacial tracts that alluvia of interglacial age were at all likely to be preserved in any abundance.
The source of the elements which compose the Pampean alluvia is very uncertain.The Argentine Republic|Pierre Denis
Hence, I believe that some of our so-called “post-glacial” alluvia will eventually be assigned to an interglacial horizon.