https://www.usgs.gov/publications/elastic-moduli-rock-glasses-under-pressure-8-kilobars-and-geophysical-implications
Elastic moduli of rock glasses under pressure to 8 kilobars and geophysical implications | U.S....
Shear and longitudinal velocities were measured by the ultrasonic phase comparison method as a function of pressure to 8 kbar on synthetic glasses of basalt,...