A Thread on the description of Bharatavarsha & its sacred mountain ranges, river systems & its people in the Brahma Purana

Rishi Lomaharshana begins the description of Bharatavarsha with this verse:

उत्तरेण समुद्रस्य हिमाद्रेश्चैव दक्षिणे।
वर्ष तद्धारत नाम भारती यत्र सतति ॥ (1)

To the north of ocean and to the South of Himalayas is the sub-continent Bharata. The subjects are called Bharatis.

नवयोउ नसाहस्रो विस्तारश्च द्विजोत्तमा । कर्मभूमिरिय स्वर्गमपवाञ्च इच्छताम् ॥

He describes Bharat as the land of of karma where swarga can be attained. (2)

महेंद्रो मलय सह्यः शुक्तिमानक्षपर्वत ।
विध्यश्च पारियात्रश्च सप्तात्र कुलपर्वता ॥

Then he describes the 7 Kulaparvatas i.e chief mountain ranges of a Bharat, namely : Mahendra, Malaya, Sahya, Suktiman, Rksa, Vindhya and Pariyatra. (3)

In below verses it is reiterated that its only from Bharat that men attain swarga & mukthi. Nowhere else on earth are holy rites prescribed for men. It also talks about rebirth. (4)

Below shlokas mention 9 divisions of Bharatavarsha, namely :

Indradvipa, Kaserumat, Tamraparņa, Gabhastiman, Nagadvipa, Saumya, Gandharva and Varuna.

Indradvipa is identified with the trans Brahmaputra region. (5)

Kaserumat is the coastal plains between the deltas of Godavari & Mahanadi rivers.

Tamaraparna is associated with the southernmost perennial river of Tamaparani which flows in southern TN.

Gabhastiman is the hilly region between Narmada & Godavari rivers. (6)

Nagadvipa is the region extended all over the mountainous belt between Narmada ranges upto the Chota Nagpur plateau (northern Chhattisgarh & parts of Jharkhand)

(7)

There is a mention of a Sowmyadvipa in Brahma Purana. In other puranas this is replaced with Simhala(Lanka) or Gandharva.

Varuna is the western coast of Bharat. (8)