Core–mantle boundary
id:
core-mantle-boundary-218-807085
title:
Core–mantle boundary
text:
The core–mantle boundary (CMB) of Earth lies between the planet's silicate mantle and its liquid iron–nickel outer core, at a depth of 2,891 km (1,796 mi) below 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
brand slug:
wiki
category slug:
encyclopedia
description:
Discontinuity where the bottom of the planet's mantle meets the outer layer of the core
original url:
https://en.wikipedia.org/wiki/Core%E2%80%93mantle_boundary
date created:
2005-01-25T21:50:59Z
date modified:
2024-09-13T10:36:41Z
main entity:
{"identifier":"Q1330051","url":"https://www.wikidata.org/entity/Q1330051"}
image:
{"content_url":"https://upload.wikimedia.org/wikipedia/commons/5/58/Slice_earth.svg","width":543,"height":533}
fields total:
13
integrity:
16