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Breccia
Breccia ( or ) is a rock composed of broken fragments of minerals or rock cemented together by a fine-grained matrix〔(Glossary of Meteoritical Terms ). Meteorlab.com. Retrieved on 2011-06-22.〕 that can be similar to or different from the composition of the fragments. The word has its origins in the Italian language, in which it means either "loose gravel" or "stone made by cemented gravel". 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. ==Types==
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Breccia」の詳細全文を読む
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