kayle1927 kayle1927
  • 10-04-2024
  • Biology
contestada

The reversals of the Earth's magnetic held were first discovered by
A, cbserving an abrupt change in seis ric wave velocities.
B. studying the paleomagnetism of volcanic rocks
C. observine the geothermal gradient in sold mines 3.5 km belove the surface.
D. studying the composition of silicate rocks.

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