Abstract
BULLEN1,2 has used the Adams-Williamson relation in region B (upper 400 km in the mantle) to relate the rate of change of density in the Earth's interior to the rate of change of seismic velocity. The Adams-Williamson relation implicitly assumed that phase changes are absent. Recent interpretations of the velocity gradient in the mantle3 have re-emphasized the importance of phase changes in region C (between 400 and 900 km). Region B is often treated as a homogeneous layer, but I present here some evidence to show that phases change may also occur in this region.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
