Breccia
1. Breccia
Grain-size > 2 mm, angular lithoclast-dominated, clast-supported matrix-free and cemented (calcite spar). Intraformational breccia when clasts formed within the basin due to syn-sedimentary processes.
High Atlas, Morocco, Verwer et al. (2009b), Della Porta et al. (2013)
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2. Breccia
Grain-size > 2 mm, angular lithoclast-dominated, clast-supported matrix-free and cemented (radial fibrous cement). To note vertical syn-sedimentary fractures filled by marine radial fibrous cement.
High Atlas, Morocco, Verwer et al. (2009b), Della Porta et al. (2013)
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3. Breccia
Grain-size > 2 mm, with angular lithoclast and bioclastic debris, clast-supported with partly carbonate mud matrix, silt- and sand-size bioclastic debris and partly blocky sparite cement.
High Atlas, Morocco, Verwer et al. (2009b), Della Porta et al. (2013)
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4. Breccia
Grain-size > 2 mm, angular lithoclasts embedded in carbonate mud matrix, matrix-supported. Breccia from the lower slope of a high-relief platform.
Pennsylvanian, Asturias, N Spain; cf. Della Porta et al. (2003, 2004)
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zoom image
Lithoclasts of clotted peloidal micrite from microbial boundstone
Platform-derived peloidal grainstone lithoclast
Isopachous rims radial fibrous cement
Carbonate mud matrix
Blocky sparite
Angular clast of clotted peloidal micrite boundstone
Carbonate mud matrix
