Consider the following statements: 1. Natural gas occurs in the Gondwana beds. 2. Mica occurs in abundance in Kodarma. 3. Dharwars are famous for petroleum. Which of the statements given above is/are correct?

Statement 1 is incorrect because Gondwana beds are primarily known for coal, containing nearly 98% of India's coal reserves [1]. While some recent exploration indicates potential for shale gas and coal bed methane in these formations [4], natural gas in commercial quantities is typically associated with Tertiary formations and offshore basins like the Krishna-Godavari basin. Statement 2 is correct as Kodarma in Jharkhand is a world-renowned center for mica production, often referred to as the 'Mica Capital of India' [5]. Statement 3 is incorrect because the Dharwar system consists of the oldest metamorphosed sedimentary rocks, which are highly mineralized with metallic ores like iron, manganese, and gold [2]. Petroleum is found in sedimentary basins of the Tertiary period (Cenozoic era), such as those in Assam, Gujarat, and the Mumbai High, rather than the ancient crystalline Dharwar rocks.

Sources

1. [1] Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 1: Geological Structure and formation of India > THE MESOZOIC ERA (THE GONDWANA SYSTEM) > p. 16
2. [4] Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 1: Geological Structure and formation of India > DHARWAR SYSTEM (PROTEROZOIC FORMATIONS) > p. 11
3. [3] Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 7: Resources > Natural Resources of India > p. 22
4. [5] Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 2: Physiography > 2. The Dharwar System > p. 50
5. [2] https://www.sciencedirect.com/science/article/abs/pii/S1875510021005126