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For more than 40 years, researchers have attempted to predict the strength of olivine in Earth's lithospheric mantle from the results of laboratory experiments. (sciencedaily.com)
To understand how water affects subduction of the oceanic plate, in which layers of different rock types sink into the mantle, the UO team studied hydrogen isotopes in water contained in tiny blobs of glass trapped in olivine crystals in basalt. (sciencedaily.com)
An S2 however, would show under the microscope some uneven darkening of olivine crystals as the specimen is examined in polarized light and there might be cracking of mineral grains in along paths other than the normal cleavage of the crystals. (meteorite.com)