Rudite is a general name used for a sedimentary rock composed of rounded or angular detrital grains, i.e. granules, pebbles, cobbles, and boulders, which are coarser than sand in size.
Rudites include sedimentary rocks composed of both siliciclastic, i.e. conglomerate and breccia, and carbonate grains, i.e. calcirudite and rudstone.
It is derived from the Latin word rudus for "crushed stone", "rubbish", "debris", and "rubble".
In nonmarine settings, gravels, which later were lithified to become rudites, accumulated within fluvial channels, within alluvial fans, and as glacial deposits.
The Greek terms are more commonly used for metamorphosed rocks, and the Latin for unmetamorphosed: