Lehmann Discovers the Earth’s Inner Core

Article abstract: Lehmann’s research hypothesized an inner and outer core, which led to investigations by others to confirm that it was a viable theorem.

Summary of Event

Prior to the development of the seismograph, an instrument that records earth vibrations or earthquakes, very little was known about the composition of the shells underlying the surface of the earth. In the late 1800’s, instrumentation and observations opened the seismological age. During this period, a basic knowledge evolved about vibrations generated by a seismic source. It was...

[The entire page is 1883 words long]

Join eNotes

The above is a free excerpt. Get total access to this content with the:

eNotes Pass