Inside [the wall] there was rubble or mortar.
--Jowett
(Thucyd.).
2. Rough stone as it comes from the quarry; also, a
quarryman's term for the upper fragmentary and decomposed
portion of a mass of stone; brash. --Brande & C.
3. (Geol.) A mass or stratum of fragments or rock lying under
the alluvium, and derived from the neighboring rock.
--Lyell.
4. pl. The whole of the bran of wheat before it is sorted
into pollard, bran, etc. [Prov. Eng.] --Simmonds.
{Coursed rubble}, rubble masonry in which courses are formed
by leveling off the work at certain heights.