course, unknown.Probably it is small, but any such effect would bring the composition of the deeper parts of the Earth closer to that of olivine.The compressibility of a sample of tachylite (basaltic glass) was also measured and found to be 1.45 X 10-6 per megabar.The velocity of longitudinal waves in this material is calculated to be 6.45 km./sec., while the velocity in a holocrystalline rock of the same composition would be 6.9 km./sec.1 L. H.
No takes yet. Share an insight, caveat, or question.
Frost et al. (1926) studied this question.