ISC meaning in Earth Science ?

The Indian subcontinent, or simply the subcontinent, is a physiographical region in South Asia. It is situated on the Indian Plate and projecting southwards into the Indian Ocean from the Himalayas. The Indian subcontinent generally includes Bangladesh, Bhutan, India, Maldives, Nepal, Pakistan, and Sri Lanka. Geologically, the Indian subcontinent is related to the landmass that rifted from the supercontinent Gondwana during the Cretaceous and merged with the Eurasian landmass nearly 55 million years ago. Geographically, it is the peninsular region in South-Central Asia, delineated by the Himalayas in the north, the Hindu Kush in the west, and the Arakanese in the east. The terms Indian subcontinent and South Asia are sometimes used interchangeably to denote the region, although the geopolitical term of South Asia usually also includes Afghanistan.