Question

Comparison between north America and Indian subcontinent

Answer 1

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Abstract

We summarize geophysical information from North America and India, and find many similarities in the deep crustal structure of the two continents. From this, we infer that similar processes have operated, particularly in the accretion and stabilization of the cratonic regions. Seismic images and other data suggest that plate tectonic processes have been active, both in the North American and Indian shields, since the late Archean. Precambrian orogens and high-pressure granulite terrains of both regions have developed nearly identically through time since about 2500 Ma. Such similarities invite direct comparisons of deep crustal structure. Here we present results from work in North America including: maps of crustal thickness, maps of average P-wave velocity of the crystalline crust, maps of average Pn (sub-Moho) velocity, and statistical analysis of crustal properties.

Journal Information

Current Science is a fortnightly journal published since 1932 by the Current Science Association, Bangalore (India) in collaboration with the Indian Academy of Sciences. The journal covers all branches of pure/applied science and technology such as physics, chemistry, life sciences, medicine, earth sciences, engineering and technology. Full length research articles and shorter research communications, review articles, scientific correspondence and commentaries, news and views, comments on recently published research papers, articles on universities and institutions, interviews with scientists, , book reviews, etc are published in the journal. Special Sections are also published on diverse and topical themes and this has served as a platform for scientific fraternity to get their work acknowledged and highlighted. The Editorial Board consists of experts from India and abroad in all scientific disciplines.

Publisher Information

CURRENT SCICENCE is published by the Current Science Association, Bangalore, in collaboration with Indian Academy of Sciences, Bangalore. The Association is registered as a Society in India under the Societies Registration Act. The main activity of the Association is publication of a fortnightly multidisciplinary journal.

Answer 2

Answer:

south america

Explanation:

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