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The Precambrian rocks of India have been classified into two systems, namely the Dharwar system and the Archaean system (gneiss and schists). The Dharwar System. The rocks of the Dharwar system are mainly sedimentary in origin, [8] and occur in narrow elongated synclines resting on the gneisses found in Bellary district, Mysore and the Aravalis ...
Exposed gneiss hillock at Lal Bagh Geological Map of South India – The Dharwars of South India. The Archean gneisses and schists, which are the oldest rocks of the Indian Shield, constitute a considerable area of Peninsular India. The Dharwar (Super Group) and the Peninsular Gneissic Complex are the classified groups of the Precambrian rocks ...
The Deccan Traps are famous for the beds of fossils that have been found between layers of lava. Particularly well-known species include the frog Oxyglossus pusillus (Owen) of the Eocene of India and the toothed frog Indobatrachus, an early lineage of modern frogs, which is now placed in the Australian family Myobatrachidae.
The Deccan Traps in the north west were formed by multiple layers of igneous rocks laid down by basaltic lava flows following a massive volcanic eruption that occurred during the end of the cretaceous period (66 mya). The underlying bed consists of granite and sedimentary rocks formed during the precambrian era and the formation of Gondwana.
Malani Igneous Suite Contact below Mehrangarh Fort in Jodhpur. Jodhpur Group-Malani Igneous Suite Contact of Aravalli range is a geological feature representing the last phase of igneous activity of Precambrian age in the Indian Subcontinent at the foot of the picturesque Mehrangarh Fort in Jodhpur city, the second largest city in Rajasthan after Jaipur.
The location map of the Dharwar Craton. The shaded area represents the Dharwar Craton. Generated from GeoMapApp (Ryan et al., 2009). [1]The Dharwar Craton is an Archean continental crust craton formed between 3.6-2.5 billion years ago (), which is located in southern India and considered the oldest part of the Indian peninsula.
Extrusive igneous rock is made from lava released by volcanoes Sample of basalt (an extrusive igneous rock), found in Massachusetts. Extrusive igneous rock, also known as volcanic rock, is formed by the cooling of molten magma on the earth's surface. The magma, which is brought to the surface through fissures or volcanic eruptions, rapidly ...
Geo-tourism: islet is an inselberg made of rocks of Assam-Meghalaya gneissic complex. [8] 6 Chabimura: Gomati district: Tripura: Geo-tourism: 15th-16th century sacred Hindu site with rock carvings on a cliff of Gomti River with massive rock cut images of Shiva, Vishnu, Karthikeya, Durga and other Hindu deities highest of which is 20 ft. [8] 7 ...