adj.
Large, coarse, angular rock fragments associated with lava flow that are ejected during explosive volcanic eruptions.
Although they may appear to resemble sedimentary conglomerates , agglomerates are igneous rocks that consist almost wholly of angular or rounded lava fragments of varying size and shape. Some geologists sort agglomerates into bombs , blocks, and breccia . Bombs are ejected in a molten state, becoming rounded upon solidification, and blocks are erupted as solid fragments. Upon accumulation and solidification of the angular fragments (also known as pyroclastics), they form agglomerates.