“megaregolith”的概念、定义、翻译、参考文献-科学参考

megaregolith

Astronomy

A layer of fractured or fragmented material that underlies the surface regolith of a rocky body, such as a planetary satellite or asteroid. A megaregolith may be formed by a major collision that causes extensive fracturing. On the Moon, the megaregolith is the thicker layer of ejecta from basin-forming impacts that underlies the surface regolith. It varies in thickness with distance from the lunar basins from a few hundred metres to a kilometre or more.

Geology and Earth Sciences

The fractured and brecciated zone of rock formed on the lunar highland crust due to the intense early bombardment during the period from 4.4 billion years ago, when the crust was forming, to 3.85 billion years ago, when the Imbrium and Orientale collisions marked the close of the massive basin-forming events. Estimates of the depth of the megaregolith extend from 1 km to 25 km, the latter estimate coinciding with an observed seismic boundary.

单词	megaregolith
释义	megaregolith Astronomy A layer of fractured or fragmented material that underlies the surface regolith of a rocky body, such as a planetary satellite or asteroid. A megaregolith may be formed by a major collision that causes extensive fracturing. On the Moon, the megaregolith is the thicker layer of ejecta from basin-forming impacts that underlies the surface regolith. It varies in thickness with distance from the lunar basins from a few hundred metres to a kilometre or more. Geology and Earth Sciences The fractured and brecciated zone of rock formed on the lunar highland crust due to the intense early bombardment during the period from 4.4 billion years ago, when the crust was forming, to 3.85 billion years ago, when the Imbrium and Orientale collisions marked the close of the massive basin-forming events. Estimates of the depth of the megaregolith extend from 1 km to 25 km, the latter estimate coinciding with an observed seismic boundary.
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