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Srinivasa Ramanujan, Indian mathematician and autodidact.

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crater row

geology

Learn about this topic in these articles:

study of volcanism

In volcano: Fissure vents
…fountains along the fissure produce crater rows of small spatter and cinder cones. The fragments that form a spatter cone are hot and plastic enough to weld together, while the fragments that form a cinder cone remain separate because of their lower temperature.
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