Breccia



rock composed of angular fragments of older rocks melded together.
Historical Examples

A Manual of Elementary Geology Charles Lyell.
Museum of Antiquity L. W. Yaggy
How to Observe in Archaeology Various
Geology James Geikie
A Manual of the Antiquity of Man J. P. MacLean
Roman Mosaics Hugh Macmillan
Seeing Europe with Famous Authors, Vol VIII Various
The Prehistoric World E. A. Allen
A Dictionary of Arts, Manufactures and Mines Andrew Ure
Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 4 Various

noun
a rock consisting of angular fragments embedded in a finer matrix, formed by erosion, impact, volcanic activity, etc
n.
breccia
(brěch’ē-ə, brěch’ə, brěsh’-)
A rock composed of angular fragments embedded in a fine-grained matrix. Breccias form from explosive volcanic ejections, the compaction of talus, or plate tectonic processes. Breccias are different from conglomerates in that the fragments they contain are angular instead of rounded.

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