Kleine, von einem Vulkan ausgeworfene Teilchen mit Durchmessern von 2 bis 64 mm.

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English:
Small pieces of material ejected by a volcano ranging in size from about 2 and 64 mm across. Well-rounded particles called accretionary lapilli can be formed by ash that sticks together in a tephra plume, owing to moisture or electrostatic forces.
Kleine, von einem Vulkan ausgeworfene Teilchen mit Durchmessern von 2 bis 64 mm.

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English:
user
Small pieces of material ejected by a volcano ranging in size from about 2 and 64 mm across. Well-rounded particles called accretionary lapilli can be formed by ash that sticks together in a tephra plume, owing to moisture or electrostatic forces.
assistant
Kleine, von einem Vulkan ausgeworfene Teilchen mit Durchmessern von 2 bis 64 mm.

Translate to English

English:
Small pieces of material ejected by a volcano ranging in size from about 2 and 64 mm across. Well-rounded particles called accretionary lapilli can be formed by ash that sticks together in a tephra plume, owing to moisture or electrostatic forces.