Waagen's lithostratigraphic subdivision was used almost for one century until Kummel and Teichert and associates in 1960's redefined the litho stratigraphy of the Salt Range and Surghar Ranges in terms of modern stratigraphic nomenclature practices as well as piloted a detailed paleontological study of the rich Late Permian and Early Triassic faunas; such as brachiopods, Ammonites, conodonts, bivalves, fusulinids
Stratigraphic significance of the fusulinids
of the Lower Productus limestone of the Salt Range.
The age of the sections was established by fusulinids
as late Bashkirian (Coronado, 2008).
On the basis of fusulinids
(first foraminifera appearing in Pakistan in Amb Formation) and different sedimentary structures observed, it is considered that Amb Formation of Central Salt Range, Pakistan was deposited in a shallow marine environment during Late Permian (Artinskian).
van (1965): Carboniferous Fusulinids
from the Cantabrian Mountains (Spain).
and calcareous algae from Sonora (northwestern Mexico), and their biostratigraphic and palaeobiogeographic implications.
As indicated by its fusulinids
(Perez Ramos, 2001), the Paleozoic platform of central and southern Sonora is a large tethysian (gondwanian) unit.
gerthi, and the fusulinids
Pseudofusulina urdalensis and Ps.
The macrofossils, in particular, fusulinids
, crinoids, bryozoans suggest a shallow marine environment for the limestones.
Such provincialism is very strong among all other stratigraphically important Permian fossil groups, especially fusulinids
Monographic studies of fusulinids
from the lower Permian of West Pakistan.