Wednesday, May 13, 2015


The pioneering scientist, who died aged 105 in 1993,  transformed our perception of Earth by discovering the existence of an inner core. She studied earthquakes to make her findings.

From what she observed Lehmann asserted that because some P-waves, which should have been deflected by the core, were of record (not deflected) then a layering in the core must be present. This layering, Lehmann theorized, is of a solid inner core, liquid outer core and is separated by some sort of boundary between the two. This boundary is known as the Lehmann Discontinuity and while for over twenty years was highly controversial it was also later confirmed (1970).


Know more:
corina marinescu

No comments:

Post a Comment