Breccia

n. rock formed from fragments of older rocks

Breccia (IPA: , ) is a rock composed of angular fragments of rocks or minerals in a matrix, that is a cementing material, that may be similar or different in composition to the fragments. A breccia may have a variety of different origins, as indicated by the named types including sedimentary breccia, tectonic breccia, igneous breccia, impact breccia and hydrothermal breccia.
See more at Wikipedia.org...

Noun
1. a rudaceous rock consisting of sharp fragments embedded in clay or sand
(hypernym) rudaceous rock
(derivation) brecciate

n. breach, gap, rubbish, rubble

(n.)
A rock composed of angular fragments either of the same mineral or of different minerals, etc., united by a cement, and commonly presenting a variety of colors.