Blank established the prime meridian in London, England

Sir George Airy

Explanation: The prime meridian is a geographical reference line that passes through the Royal Observatory, Greenwich, in London, England. It was first established by Sir George Airy in 1851, and by 1884, over two-thirds of all ships and tonnage used it as the reference meridian on their charts and maps.

the boundarys like convergent divergent and transform it causes subduction

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