Specific Metamorphic Rocks
The commonly used names that specify a particular rock type are listed below. As a rule, these names take precedence over the textural names –
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Continental Flood Basalts
Flood basalt is formed by an eruption or series of eruptions of large volcanic episodes that cover vast stretches of land or ocean floor with flows of mafic igneous rocks (basalt lava flows). A flood-basalt province is popularly known as Trap (Deccan Traps in India). Some major flood basalts provinces are as follows – Name Approximate
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Flow net
Flow net is a graphical representation of two-dimensional steady state ground water flow through aquifers. In a flow net, the strip between two adjacent flow lines is called a flow channel or flow tube. The drop in head between any two adjacent equipotential lines is the same and is called potential drop. Construction of a
Delhi Super group
Delhi Supergroup rocks are exposed in the Aravalli Mountains as a NE-SW trending ling linear belt from Delhi in the north-east through southeastern Haryana and Central Rajasthan to the north-eastern pat of Gujrat in the south-west. These rocks are strongly deformed and metamorphosed, only isolated hills and ridges made up of Delhi rocks. Delhi supergroup
Aravalli Delhi fold belt
The Aravalli Mountains extending from Delhi in the north-east to the Gulf of Cambay in the south-west. The besetment of the Aravalli Mountains is comprised of Banded Gneissic Complex of Neoarchean age. It is overlain by three major cycles of deposition followed by orogenic deformation over the period from about 2.2Ga to 0.85 Ga. They
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Marwar (Bikaner-Nagaur) Supergroup
A sequence of predominantly arenaceous and calcareous sediments was deposited in Bikaner-Nagaur Basin in the west of the Aravalli Range that has been formally named as Marwar Supergroup. This sequence was earlier regarded as equivalent of the Upper Vindhyan Group and was named as the Trans-Aravalli Vindhyans.
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Assam Arakan Basin
The Upper Assam and Purvanchal Range of the North-eastern India and its adjoining Shilong Plateau and Mikir Hills exposes a vast thickness of Cenozoic formations. The cenozoic formations were deposited over the basement of Precambrian rocks and Lower Gondwana Group. The oldest fossiliferous sequence of the region contains fossil assemblages indicating Upper Cretaceous age, which
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Cuddapah Super group
The Cuddapah Basin is a crescent shaped, N-S trending Proterozoic basin in east-central part of the Dharwar craton. Chitravati (Cheyyair) Group :- The Chitravati Group consists of two formations: the Pulivendla Quartzite and the Tadpatri Formation. The transition from the Papaghni Group to the Chitravati Group is marked by the intermittent occurrence of mafic flows
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