Chapter 1

Continents in the early 1960s

Story

At this time, geology was concerned largely with stratigraphy. “It was not clear at the time that mountain building was anything to do with earthquakes,” recounts McKenzie. “There was a question whether all earthquakes were produced by movements on faults, or implosions or explosions underground, or phase changes. The whole relationship to tectonics was unclear.”

ARCHIVE REFERENCE: LDGSL/1108/A/1/8
Page from Ted Irving’s undergraduate notebooks on the mechanisms of earthquakes, 1950-1951.