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Terrestrial Climate
olivine crystals from Mauna Loa


These are olivine crystals from Mauna Loa volcano, Hawaii, with a width of less than 1 mm. The brown ovals are solidified, glassy inclusions trapped as droplets of melt by the growing olivine crystal. They contain strontium isotope ratios which are inherited from 500-million-year-old seawater. Credit: Sobolev, Max Planck Institute for Chemistry

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