Structure of the Earth the crust, upper mantle, lower mantle, outer core, and inner core. The geologic component layers of Earth are at the following depths below the surface: The layering of Earth has been inferred indirectly using the time of travel of refracted and reflected seismic waves created by earthquakes. The core does not allow shear waves to pass through it, while the speed of travel (seismic velocity) is different in other layers. The changes in seismic velocity between different layers causes refraction owing to Snell's law, like light bending as it passes through a prism. Likewise, reflections are caused by a large
What We Do in Secret What We Do in Secret What We Do In Secret is an American Christian hardcore band from Memphis, Tennessee. They have toured with bands such as War of Ages, Phinehas, Silent Planet, Sleepwave, We Came As Romans, '68, For Today and Norma Jean. They have released two EPs. What We Do In Secret was formed in Memphis in March 2012 by Josh Adams, Drew Nance, Devin Harris and Nathan Moody. They recorded their first EP, "New Eyes", and released it on August 31, 2013. Moody left the band after this and was replaced by Clay Crenshaw and Austin Barnes. The