paleocrystic ice

例句：

1. 1.The ancient ice formations in the Antarctic are a wonder of nature.
   南极洲的古代冰层是大自然的奇迹。
2. 2. Paleoclimatic records reveal that the Earth's climate has changed significantly over time.
   古气候记录表明，地球的气候在过去发生了显著变化。
3. 3.The paleocrystic ice is believed to be an important indicator of past environmental conditions.
   古代冰岩被认为是过去环境条件的重要指示器。