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Le tragique destin de la maman escargot
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प्राचीनतम जंतुओं के जीन से नयी उम्मीद
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Fossils of Dickinsonia, one of Earth s oldest animals, found in Madhya Pradesh
Dickinsonia is an extinct genus of basal animal that lived during the late Ediacaran period in a geographical area now divided into Australia, China, India, Russia and Ukraine.
New Delhi: Researchers have discovered fossils of one of the Earth s earliest known multicellular animals the 550-million-year-old Dickinsonia on the roof of the Bhimbetka rock shelters in Madhya Pradesh.
Dickinsonia is an extinct genus of basal animal that lived during the late Ediacaran period in a geographical area now divided into Australia, China, India, Russia and Ukraine.
The individual Dickinsonia typically resembles a bilaterally symmetrical ribbed oval. Its fossils are known only in the form of imprints and casts in sandstone beds.
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New Delhi, May 3
Researchers have discovered fossils of one of the Earth s earliest known multicellular animals the 550-million-year-old Dickinsonia on the roof of the Bhimbetka rock shelters in Madhya Pradesh.
Dickinsonia is an extinct genus of basal animal that lived during the late Ediacaran period in a geographical area now divided into Australia, China, India, Russia and Ukraine.
The individual Dickinsonia typically resembles a bilaterally symmetrical ribbed oval. Its fossils are known only in the form of imprints and casts in sandstone beds.
The specimens found in Bhimbetka are around 17 inches long, where as the ones that have been found in other parts of the world exceeded four feet in length, the researchers from Geological Society of India (GSI), Nagpur, Maharashtra, noted.
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A Central African Shield Amalgamation Tale
The Earth has a 4.6-billion-year history; since about 1.9 billion years ago, it has been punctuated by a quasi-cyclic formation and break up of supercontinents – large landmasses that comprised the majority of the Earth’s continental crust. The formation and disruption of supercontinents had great impact on the environment, climate and possibly Earth’s interior.
Reconstructing the processes of amalgamation and disruption of these supercontinents is crucial to our understanding of plate tectonics, plate motion, thermal balance of the Earth, and long-term environmental changes.
There is a large consensus that around 200 million years from now the Earth will form another supercontinent, possibly centered in present day Asia.
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