india geological history
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Geo history India: PreviewTRANSCRIPT
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Indian GeographyPhysical geo of India
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Geological history of India
Physiography of India
Indian weather: seasons
Climatic regions of India
Soils of India
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•Pre-Cambrian era• India part of Gondwana land
Geological history of India
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• Indian Peninsular plate =Oldest crustal block of India•Collision between 3 proto continents
1) Aravalli2) Dharwad3) Singhbhum
Pre-Cambrian era
Aravalli
Dhrawad
Singhbhum
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•3 lineaments1) Narmada2) Son3) GodawariRemmenants:Aravalli R, Dharwad plt, Singhbhum plt
Pre-Cambrian era
NarmadaSon
Godavari
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Geosynclines at margins of Proto-continents:1) Aravalli2) Vindhyan3) Satpura4) Eastern Ghats5) Bijawal
Pre-Cambrian era
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•Reactivation of Narmada – Son-Godawari lineament•Rifting of Mahanadi and Damodar valley •Submergence of forest-Development of coalfields
Gondwana times
Narmada Son
GodavariM
ahanadi
Damodar
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•Faulting along western edge of peninsular plateau
Gondwana times
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•150 ml yrs ago Indian plate broke from Gondwana land•Started northward journey•15 ml yrs ago India broke from Madagascar
Mesozoic time
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• India move over Reunion Islands•Hotspot volcanism•Deccan lava plateau•Narrowing of Tethys sea
Late Cretaceous
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•Collision between Indian plate and Eurasian plate•Upliftment of Himalayas
Tertiary time
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•The jerk – activation of crack created at western margin of peninsula•Breaking of western part – subsidence – peninsula raised at western side •Tilted on west-east direction•Western ghats = horst
Tertiary Time
Slope: South eastern
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•3 phases of formation of Himalayas:
1) Great Himalayas (Oligo-Eocene)
2) Mid-Himalayas (Miocene)
3) Outer-Himalayas (Pleistocene)
Tertiary time1
2
3
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•Late Pleistocene – formation of Northern plains•Sediments from Himalayan rivers
Tertiary time