Ancient diamond preserves evidence of water-bearing mineral deep in Earth's mantle

Ancient diamond preserves evidence of water-bearing mineral deep in Earth's mantle. A team of Brazilian researchers discovered the first direct evidence that goethite—the mineral responsible for the brown color of soils—can withstand extreme pressures and temperatures all the way to the planet's interior inside a diamond just 3 millimeters (0.1 inch) long, within a microscopic impurity.

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Trechos de apoio da pauta: A team of Brazilian researchers discovered the first direct evidence that goethite—the mineral responsible for the brown color of soils—can withstand extreme pressures and temperatures all the way to the planet's interior inside a diamond just 3 millimeters (0.1 inch) long, within a microscopic impurity. Goethite forms in soil and on the ocean floor from iron-rich minerals in the presence of water.

• Ponto de atenção: ancient.
• Ponto de atenção: diamond.
• Ponto de atenção: preserves.

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