Recent detailed studies on the Batain nappes (northeast coast of Oman), which represent a
special part of the so-called ‘Oman Exotics’, have led to a better understanding of the Neotethyan geo-dynamic
evolution. The Batain Exotics bear witness to volcanic activity, sea-level changes, tectonic
instability, rifting and oceanization along the Eastern Oman margin during Late Palaeozoic and
Mesozoic times. They allow definition of the Batain basin as an aborted Permian branch of Neotethys.
This marine basin was created in Early Permian times extending southward to the East African/
Madagascar region and was linked to the Karoo rift system. The presented revised classification of the
Batain nappes considers the Batain basin to be no longer a part of the Hawasina basin and the
Neotethyan margin proper. We attribute the Batain basin to a Mozambique–Somali–Masirah rift system
(Somoma). This system started in Early Permian, times, creating a marine basin between Arabia
and India/Madagascar; rifting in the Late Triassic and oceanization during Late Jurassic times led to
the separation of East Gondwana.