Core–mantle boundary Core–mantle boundary The core–mantle boundary (CMB in the parlance of solid earth geophysicists) of the Earth lies between the planet's silicate mantle and its liquid iron-nickel outer core. This boundary is located at approximately 2891 km (1796 mi) depth beneath the Earth's surface. The boundary is observed via the discontinuity in seismic wave velocities at that depth due to the differences between the acoustic impedances of the solid mantle and the molten outer core. P-wave velocities are much slower in the outer core than in the deep mantle while S-waves do not exist at all in the liquid portion of
The Sum of Its Parts 2014. The title directly refers to a quote recorded by Greek philosopher, Aristotle. The album received moderate reviews upon release, with The Irish Times garnering it 3 stars out of 5, claiming ""it’s precisely what you might expect from a Chicane album"". The Sum of Its Parts (The Whole is Greater Than) The Sum of Its Parts is the sixth studio album by British electronic music artist Chicane. It was released on 26 January 2015 by Modena Records and Armada Music. The album debuted at number 44 on the UK Albums Chart, selling 1,987 copies in its first week. On