Geologists commonly refer to events that happened in: a. Days and hours ago. b. Tens of years ago. c. Millions or billions of years ago. d. Hundreds of years ago. P-wave is travelling in the subsurface layers: a. Transvers to the seismic wave propagation. b. Parallel and across to the seismic wave propagation. c. Shearing motion. d. Not of all. Which seismic belt is called the (Ring of fire)? a. Alpain-Himalaya belt. b. Pacific belt. c. Atlantic belt. d. Not of all. One of the principles related to "Stratigraphy" used to determine the geologic history of a locality or a region is: a. Paleo-fossils. b. Rocks similarity. c. Unconformities. d. Not of all.

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