Früher Kalzitzement in skandinavischen Orthocerenkalken: Beziehungen zum Glaukonit

Interrelations between glauconite and calcite cement are added to different indicators of preservation of early diagenetic phenomena in Lower Ordovician limestones of Sweden. The interrelations briefly discussed are, 1. glauconite postdating calcite cement in an early fracture filling, 2. glauconite postdating and coeval with calcite cement in the central cavity of sponge spicules, 3. glauconite intergrown with calcite single crystals, 4. calcite cement grown pari passu with shrinkage of glauconite grains, 5. relics of (resedimented?) calcite cement enclosed in glauconitic hardground crusts, 6. calcite cement enclosed in slumped massive glauconitite.