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Pronunciation Guide
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Listen to native speakers pronounce “tephra” in real conversational contexts with synchronized timestamps and subtitles.
Lava can sputter up along fractures in the ground, called a fissure eruption.Or it can fountain from a central vent, falling back down as tephra: chunks of rock that can be as small as ash, or as big as houses.This can create small, steep-sided volcanoes called cinder cones— like Parícutin in Mexico.