<Ul> <Li> Lava </Li> <Li> Tephra </Li> <Li> Volcanic bomb </Li> <Li> Lapilli </Li> <Li> Volcanic ash </Li> </Ul> <Table> <Tr> <Th_colspan="4"> Classification of Volcaniclastic rocks and sediments </Th> </Tr> <Tr> <Td> </Td> <Td> </Td> <Th_colspan="2"> Pyroclastic deposit </Th> </Tr> <Tr> <Th> Clast size in mm </Th> <Th> Pyroclast </Th> <Th> Primarily unconsolidated: tephra </Th> <Th> Primarily consolidated: pyroclastic rock </Th> </Tr> <Tr> <Td>> 64 mm </Td> <Td> Bomb, block </Td> <Td> Agglomerate, bed of blocks or bomb, block tephra </Td> <Td> Agglomerate, pyroclastic breccia </Td> </Tr> <Tr> <Td> 64 to 2 mm </Td> <Td> Lapillus </Td> <Td> Layer, bed of lapilli or lapilli tephra </Td> <Td> Lapilli tuff </Td> </Tr> <Tr> <Td> 2 to 1 / 16 mm </Td> <Td> Coarse ash grain </Td> <Td> Coarse ash </Td> <Td> Coarse (ash tuff) </Td> </Tr> <Tr> <Td> <1 / 16 mm </Td> <Td> Fine ash grain (dust grain) </Td> <Td> Fine ash (dust) </Td> <Td> Fine (ash) tuff (dust tuff) </Td> </Tr> </Table> <Tr> <Th_colspan="4"> Classification of Volcaniclastic rocks and sediments </Th> </Tr> <Tr> <Td> </Td> <Td> </Td> <Th_colspan="2"> Pyroclastic deposit </Th> </Tr>

A common mineral in solid form that starts with rock