Owen fracture zone

The top layers of the Southern Ridge are formed by the Oligocene-Early Miocene turbidites of the Indus River Fan and later cover.

The Qalhat Seamount and Murray Ridge are located at the northern end of the Owen fracture zone.

In the Arabian Basin the current splits into a northern and southern branch that both flow parallel to the Carlsberg Ridge.

According to one reconstruction,[9] before the initiation of the Carlsberg Ridge the Arabian–Indian boundary was located off Oman 90 to 60 Ma while the Mascarene Basin opened between Madagascar and the Seychelles.

This coincides with a general reorganisation of continental plates in the Indian Ocean in response to the Arabia-Eurasia collision.