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Lapilli

Literally, "little stones. " Round to angular rock fragments, measuring 1/10 inch to 2 1/2 inches in diameter, which may be ejected in either a solid or molten state.

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lapilli
Natural environment; Volcano

Literally, "little stones. " Round to angular rock fragments, measuring 1/10 inch to 2 1/2 inches in diameter, which may be ejected in either a solid or molten state.

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Non or slightly vesicular pyroclastics, 2. 0 to 76 mm in at least one dimension, with an apparent specific gravity of 2. 0 or more.

lapilli
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Pyroclastics that may be either essential, accessory, or accidental in origin, of a size range that has been variously defined within the limits of 2 mm and 64 mm. The fragments ...

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Volcanic ashes, consisting of small, angular, stony fragments or particles.

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