2008年，科学家首次发现尼利•福萨岩石群中含有碳酸盐成份。
Scientists had first discovered that the Nili Fossae rocks contained carbonate in 2008.
液化二氧化碳将会在岩石中贮存很长的时间，与铁、钙以及海水产生化学反应产生白垩(即术语所说的碳酸盐)。
It would become trapped inside for a long period of time, reacting with iron, calcium, and sea water in the rocks to make chalk (known more technically as carbonates).
两组岩石群所含有的碳酸盐十分相近，而这一点对于研究来说十分关键，因为皮尔巴拉地区的岩石被用于研究35亿年前地球早期阶段的生命。
The similarities between the two sets of rocks in terms of carbonates is important because Pilbara is used to study the early stages of life on Earth 3.5 billion years ago.
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