agglomerate

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agglomerate

a rock consisting of angular fragments of volcanic lava

agglomerate

[ə′gläm·ə·rət]
(geology)
A pyroclastic rock composed of angular rock fragments in a matrix of volcanic ash; typically occurs in volcanic vents.
(metallurgy)
A rigid mass of metallic particles that have been joined together by a powder metallurgical technique, such as sintering.