EARLY STAGES IN DEVELOPMENT OF OVERGROWTHS ON ECHINODERM FRAGMENTS IN LIMESTONES

SUMMARY The present paper describes the first stages of echinoderm overgrowth by calcite, observed in partially cemented limestones from boreholes in the floor of the Persian Gulf. The overgrowths which develop as spires in the direction of the c-axis of calcite show all essential features that were inferred in a previous paper for the early stages in development of overgrowths in fully cemented Jurassic limestones.