Sampled in the context of research Prof. Dr. Veerle Cnudde.
Natural color
dark grey
Aged color
light grey
Components
white bioclasts (mainly crinoids) and carbonate intraclasts in a dark grey matrix
Texture
Structure
Weathering
light grey patina as the result of oxidation of organic material; frost sensitive when high clay fraction (vague plate-like cleavage); scratch sensitive
calcite (>3/4), detrital quartz (<1/4), traces of dolomite, pyrite and a diffuse clay fraction; heterogeneous dispersed distribution of crinoids, shell fragments of Brachiopoda, Ostracoda, Gastropoda, coral fragments, Algae and more sporadic Bryozoa; micrite-microsparite matrix; very low porosity
Texture
very fine grain size
Structure
dark parallel oriented lenticular stains and striates (higher content of organic material); sometimes fine calcite veins
Weathering
Diagnostic features
very fine grained limestone; heterogeneous distribution of fossil fragments; lenticular stains/striates of organic material
Additional information
representative microscopic features of the microstructure and mineralogy of the stone