Layer
Name
Calcite hydrothermal concretion
Physical characteristics
Type of layer
compact raw
Thickness
2.0  ± 0.1  mm
Texture
compact fine grained
Type of porosity
open pores
Formation mode
natural concretion formation
Comments
floor of underground river in a petrifying spring
Number
1
Arrangement
single material
Materials
  Name Arrangement Mass (g) Mass fraction Abundance comments
Calcite 1.0 possible presence of additional minor phases and significant amount of adsorbed water