(1969): On the phylogenetic sequence of the
Nummulites fabianii Grup.
i)
Nummulites mamillatus This species was most abundantly found in the Sakesar Limestone.
The foraminiferal assemblage is represented by numerous larger benthic perforate foraminifera such as lepidocyclinidae and nummulitidae (
Nummulites and Operculina).
Nummulites atacicus/mamilia group which was present in the early Eocene to middle Eocene.
The SBZ 19 is defined by the first appearance of
Nummulites fabianii and Spiroclypeus (Figs 3-4).
Foraminifera are including Textularia spp., Quinqueloculina spp., Elphidium spp.,
Nummulites sp., Triloculina trigonula, Spiroloculina spp., Pyrgo spp., Spirolina spp., Bigenerina sp., Triloculina sp.,
Nummulites sp.
Key Words: Chorgali, Jhalar, Kala Chitta, Shallow benthic Biozones SBZ, Kohat-Potowar, Alveolina,
NummulitesThese succession has been deposited during Palaeocene- Eocene Termal Maximum and they have considerable amounts of two distinct species of large Nummolites:
Nummulites burdigalensis,
Nummulites laevigatus(SB13 and SB10).
The upper part has yielded an assemblage that consist of
Nummulites fabianii and species of Heterostegina, Calcarina, Pellistella, Asterocyclina, Austrotrillina, Amphistegina, Discocyclina and Operculina which suggests a Late Eocene (Priabonian) age.
Nummulites and Milliolids, representing middle neritic environment of deposition.