Overview

core


Show Summary Details

Quick Reference

1 The central part of the Earth, the core is the point within the Earth where S-waves cannot penetrate, marked by an abrupt increase in pressure. It is believed to be composed primarily of a nickel-iron alloy (along with abundant platinum-group elements), with a liquid outer zone, 2 900–5 000 km deep, and a solid inner zone, 5 000–6 370 km deep.

2 See core region.

Subjects: Environmental Science.


Reference entries

See all related reference entries in Oxford Index »


Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.