sedimentary breccia

sedimentary breccia

[¦sed·ə¦men·trē ′brech·ə]
(petrology)
A rock composed of fragments that are larger than 2 millimeters in diameter and are the result of sedimentary processes; characterized by imperfect mechanical sorting of its materials and by a higher concentration of fragments from one local source or by a wide variety of materials mixed together in no particular pattern. Also known as sharpstone conglomerate.
References in periodicals archive ?
The BIF and strongly altered BIF/schist package are located within a folded stratigraphic sequence with mafic mudstone and siltstone which also contain sedimentary breccia horizons that can be weakly to moderately silicified, pyrrhotite mineralized, and carry anomalous gold mineralization.
The College Hill deposit is a laminated BIF with considerable disturbed bedding having associated siltstones and flat-pebble sedimentary breccia cemented by specular hematite.
Sedimentary breccia occurs within the massive sheets.