Layer
Name
Layer #1
Physical characteristics
Type of layer
compact raw
Thickness
10.0  ± 3.0  mm
Mass
4.04 g
Texture
compact fine grained
Type of porosity
porous
Comments
meso-macropores, 40%, partly filled with hematite, and little manganese and clay minerals
Formation mode
no preparation
Number
4
Arrangement
heterogeneous mixing
Materials
  Name Arrangement Mass (g) Mass fraction Abundance comments
Hematite-goethite hematite and minor amount of goethite both in cement and as pseudomorphosis of bioclasts (crinoids and others) 0.917 91.7% of the crystalline phases
Quartz grains embeded in a ferric matrix (hematite + some goethite), isolated 0.05 < 5%. Assumed mass fraction = cross section fraction
Fluorite grains embeded in a ferric matrix (hematite + some goethite), isolated 0.05 < 5%. Assumed mass fraction = cross section fraction
Baryte grains embeded in a ferric matrix (hematite + some goethite), isolated 0.05 < 5%. Assumed mass fraction = cross section fraction