BGS Linked Open Data


Phono-tephrite ['PNTEPT'] [''] ['Phono-tephrite - A type of tephritic-rock, classified using the total alkali silica (TAS) classification. The TAS classification may be used if the mineral mode of a normal fine-grained crystalline rock cannot be determined due either to the presence of glass or to the fine-grained nature of the rock. The definition of phono-tephrite is as shown in British Geological Survey Research Report RR/99/06, section 5.2 and figs. 17b, 20.'] ['Phono-tephrite'] ['stable'] [''] [''] ['Phono-tephrite'] ['']