Cameroon GCE O-Level Geology Practice Questions - Cameroon General Certificate Of Education Ordinary Level Geology (Code 0555) Exam

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The Gutenberg discontinuity is located at a depth of approximately 2,900 km beneath the Earth's surface. What critical seismic evidence identifies this boundary?

P-waves are completely absorbed while S-waves accelerate to twice their crustal speed. S-waves terminate abruptly because they cannot pass through liquid, while P-waves refract sharply and slow down. Both P-waves and S-waves reflect backward completely, leaving the entire core undetectable. Seismic waves travel unchanged in velocity and direction throughout this zone.

Correct Answer:

S-waves terminate abruptly because they cannot pass through liquid, while P-waves refract sharply and slow down.

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