Gondwanaland and the Gondwana Rock System: India’s Coal Backbone

What is Gondwanaland, and where does its name come from?

Gondwanaland was an ancient supercontinent that once joined present-day India, Africa, South America, Australia, and Antarctica together. Here’s how it got its name, and where its rocks sit today:

• The name comes from the Gond region of central India, in today’s Madhya Pradesh and Chhattisgarh.
• Geologist H.B. Medlicott applied “Gondwana System” to a distinctive rock sequence there in the 1870s.
• Austrian geologist Eduard Suess later extended the name to the entire ancestral southern supercontinent.
• The Gondwana rock system formed during the Permian period, roughly 250-300 million years ago, and holds India’s major coal-bearing formations.
• Gondwana rocks fill long, narrow river-valley basins, mainly the Damodar, Son, Mahanadi, and Godavari valleys, each formed as an old rift trough.

How much of India’s coal comes from this one rock system?

Gondwana coalfields contribute the overwhelming majority of India’s total coal production:

• About 98% of India’s coal production comes from Gondwana coalfields, concentrated along the Damodar, Son, Mahanadi, Godavari, and Wardha valleys.
• Of India’s total estimated coal reserve of about 400.7 billion tonnes, roughly 399,020.80 million tonnes sit in Gondwana coalfields.
• India runs 64 operational coalfields: 45 Gondwana and 19 Tertiary, a telling measure of how lopsided this dependence is.
• A uniform Glossopteris flora dominated the entire Gondwana supercontinent during the Permian period, evidence used to reconstruct its extent.
• The Godavari Valley’s Singareni coalfield, in Telangana, is one of the largest Gondwana coalfields outside the Damodar Valley belt.

What are the six layers of the Gondwana sequence?

India’s Gondwana Supergroup is classified into six major formations, in ascending order:

• Talchir, the lowest formation, sits directly on the Precambrian basement and is made of glacial boulder beds, evidence of a Permo-Carboniferous ice age.
• The Damuda group (Barakar, Barren Measures, and Raniganj) holds the most important coal-bearing rock in the sequence; Barakar alone carries the thickest seams.
• Raniganj, in West Bengal, gave its name to India’s first commercially worked coalfield, opened in 1774.
• The Barren Measures formation, true to its name, sits between Barakar and Raniganj and holds almost no workable coal.
• Panchet, of Lower Triassic age, is the youngest formation of the coal-rich Lower Gondwana; its red sandstones mark a shift to a drier climate.
• Mahadeva, mostly barren sandstone, sits at the top of the sequence, in the largely coal-poor Upper Gondwana.

How did India’s rocks help prove continental drift?

Gondwanaland’s breakup, driven by plate tectonics, scattered its rock formations across today’s separate continents:

• India’s Gondwana rock system is one surviving piece of that original landmass.
• Naming the entire supercontinent after one Indian region shows how influential early Indian geological surveys were.
• Matching Glossopteris fossils across separated continents is key evidence that those continents were once joined.
• Concentrating 98% of coal production in one rock system creates real economic dependence on Gondwana coalfield mining.

Why did the flora change between Lower and Upper Gondwana?

Two very different plant communities dominated the Gondwana sequence at different times, and the switch explains where the coal actually is:

• Glossopteris and Gangamopteris, cold-tolerant seed ferns, dominated the Lower Gondwana forests alongside the coal-forming swamps.
• Ptilophyllum and Dicroidium, warmth-loving cycad-like plants, replaced them in Upper Gondwana times, marking a shift in climate.
• This flora shift explains why Lower Gondwana rocks hold almost all of India’s coal, while Upper Gondwana rocks largely don’t.
• Geologists still use fossil plant assemblages to date a given Gondwana rock layer as Lower or Upper.

What does India’s latest coal output look like?

India recorded coal production of 210.46 million tonnes from captive and commercial mines in FY 2025-26, a 10.22% year-on-year jump. (Source: Akashvani News)

• Twelve captive and commercial coal blocks were operationalised in FY 2025-26. Together they added over 86 MT of annual production capacity, mostly from Gondwana-belt mines.
• The Coal Ministry has set a national target of 1.15 billion tonnes for FY26, up from a record 1.05 billion tonnes in FY25.
• Because Gondwana coalfields supply the overwhelming majority of this output, this article’s own 98% figure is exactly what these production records are measuring.