Eifel

Sandgrube Engeln

Location: 50.431 N,  7.147 E

Elevation: 523 m

 

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Sandgrube Engeln

Lapilli is a size classification term for thephra, which is material that falls out of the air during aVolcanic eruption. Lapilli (singular: lapillus) means "little stones" in Latin. They are in some senses similar to ooids or pisoids diameter. A pyroclastic particle greater than 64 mm in diameter is correctly known as a volcanic bombs when molten, or a volcanic block when solid. Pyroclastic material with particles less than 2 mm in diameter is referred to volcanic ashes.

 

Photo: Rolf Cosar                                                                                                                                                                        Engeln, 16.08.2008

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