Contrasts in Palaeozoic and Precambrian Rock Records The Palaeozoic rock formations are renowned for their rich fossil records, starkly contrasting the largely unfossiliferous nature of Precambrian rocks. This distinction raises intriguing questions about the sudden appearance of abundant and complex life forms at the beginning of the Palaeozoic Era. Several theories have been proposed to […]
Composition of Extra Peninsula Extrapeninsular India Extra Peninsula comprises the Himalayas in the North, Arakan Yoma in the East, and foredeep folded beds also known as Shiwaliks or Outer Himalayas in the South. The Himalaya sensu stricto represents the large orogenic belt that covers a length of 2500 km and a width of 300-400 km.
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What is Cuddapah Basin? The crescent-shaped, convex towards the west, easterly concave, and NS trending Cuddapah basin covers an area of 44,000 sq. km in the east-central part of the Dharwar craton. The Cuddapah Basin is an arcuate north-plunging, low-amplitude asymmetrical synclinorium. Cuddapah sedimentation commenced in the interval 1700–1800 Ma. The basin extends for a
What is the Chhattisgarh Basin? The Chhattisgarh basin is the largest Purana basin in the Bastar craton, covering approximately 36,000 sq. km. It is situated on the northern edge of the Bastar craton and is bounded by several geological features: The basin is the third largest Purana basin after the Vindhyan and Cuddapah basins, extending
Proterozoic Sedimentary Basins (Purana Basins) A number of nearly flat-lying, virtually un-metamorphosed, and partly deformed Proterozoic cratonic basins form a significant part of the Precambrian shield of India. These sub-horizontal Proterozoic basins predominantly contain orthoquartzite shale-carbonate suites varying in thickness from 100 to 10,000 meters and were deposited episodically, with frequent breaks in sedimentation, over
Satpura Mobile Belt (SMB) What is the Satpura Mobile Belt? The Satpura Mobile Belt (SMB) is a very long east-west trending orogenic belt that traverses the northern part of Peninsular India. It divides the Indian shield into the northern Bundelkhand protocontinent and the southern Deccan protocontinent. How is the Satpura Mobile Belt divided? The belt
What is the Eastern Ghats Mobile Belt (EGMB)? The Proterozoic Eastern Ghats Mobile Belt (EGMB) extends for about 1000 km in a NE direction from Ongole in Andhra Pradesh in the south to Brahmani River in Orissa in the north, with a maximum width of about 300 km. It lies along the eastern margin of
Deterioration of Land Quality: The United Nations celebrated 2015 as the ‘World Soil Year’ and designated 2015-2024 as the ‘International Decade of Soils.’ India, with the 10th largest cultivable land resource globally, hosts 46 out of 60 soil types found worldwide. National and international agencies predict a future decline in cultivable land and soil fertility
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Aravalli Craton What areas does the Aravalli Craton cover? The Aravalli Craton covers over one lakh(100000) sq. km, including the entire state of Rajasthan, parts of Gujarat, Madhya Pradesh, and fringes of Delhi and Haryana. What are the main components of the composite Aravalli Craton? The composite Aravalli Craton consists of the Mewar Craton in
Aravalli Craton | Aravalli Supergroup | aravalli craton stratigraphy Read More »