当大陆上的冰开始融化时,两块冰原之间形成了一条无冰走廊,这一证据主要来自放射性碳测年法。
Evidence that an ice-free corridor between two ice sheets developed when the continental ice first began to melt came primarily from radiocarbon dating.
随着时间的推移,压力的增加,再加上从上方重新冻结的融水,小冰原颗粒成为相互锁结的大晶体蓝色冰川冰。
With additional time, pressure, and refrozen meltwater from above, the small firn granules become larger, interlocked crystals of blue glacial ice.
在火星上存在冰这并不足以令人惊讶,令人惊讶的是冰的纯度之高和埋藏冰原的范围之广。
The presence of ice on Mars is not a surprise, although the purity and extent of the buried ice sheets is.
Field ice, for example, and other representations in the field.
比如冰原冰,以及空间里的其他物质。
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