Samples recovered from the expedition revealed important differences in chemical composition and fossil distribution among the sediment layers.

探险队采集的样品揭示了沉积物层之间化学成分及化石分布上的重大差异。

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The chemical compound, ethanol, has risen in recent years as the most viable alternative to fossil fuels.

化合物乙醇近年来作为最可行的化石燃料替代品开始兴起。

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Chemical energy gasoline, fossil fuel can be burned, converted to heat, converted to electricity.

化学能，汽油，矿物燃料能被燃烧，转化成热量，再转化成电。

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As noted in previous posts, current consumption figures do not reflect the expected growth in areas such as chemical industry feedstocks, or power generation (where most new fossil-based supply will come from highly efficient gas-fired generators).

FORBES: Just How Long Will U.S. Gas Supplies Last?

The Anthropocene's equivalent of iridium is nitrogen - although there will be other candidates (such as heavy metals, and carbon isotope ratios characteristic of fossil fuel emissions) for geochemists of the far future to identify as the chemical signature of the new epoch's dawn.

BBC: Leaving our mark: Fossils of the future