It is then followed by meteoric diagenesis leading to neomorphism and cementation.
Micritization occurred in marine, dolomitization took place in mixed marine-meteoric while neomorphism and cementation occurred in meteoric conditions.
The diagenetic features recorded includes compaction, micritization, neomorphism
, recrystallization, dolomitization, pressure dissolution and fracturing.
Diagenetic features like biogenic alteration, bioturbation, stylolites, compaction (including pressure dissolution), neomorphism
, micrite envelops, veins, dolomitization, cementation and tectonic fracturing are clearly observed in the formation.
Globotruncana are highly affected by neomorphism, mechanical breakage and replacement.
Test of planktons show the effect of neomorphism and exhibit sparry texture (Fig.
The diagenetic overprinting of these facies includes micritization neomorphism (microspar aragonite calcite transformation dolomitization) and compaction (disorientation of biocalst pressure dissolution fabric).
The formation of microspar has been attributed to aggrading neomorphism (Folk 1965).
The next step is neomorphism which takes place in the form of aragonite to calcite transformation aragonite is unstable mineral and
it changes to low magnesium calcite (LMC) along with the aggrading neomorphism (recrystallization of calcite) which is common in muddy shelf sediments occurs typically in shallow environment by moving of super saturated CaCo3 water especially in meteoric diagenetic environment (Heckel 1983).
The middle facies which is grains supported contains negligible porosity (0-5%) this microfacies has neomorphism (aragonite to calcite transformation generation of microspar) along with stylonodular and stylobrecciated fabric.