History of ancient or ancient and medieval stage development of general earthquake

The great medieval encyclopedist Abu Rayhan Muhammad ibn Ahmad al-Beruni studied a number of sciences of his time: geography, geodesy, geology, astronomy, physics, mathematics, mineralogy, and history. The question is, are the remaining three-fifths of the globe made up of oceans? This result was inconsistent with Beruni's knowledge of mineralogy, as he was well aware that the continents were composed of various heavy rocks.

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