Item talk:Q43347
From geokb
Mindat Description
Mafites tentatively identified as tephrite, with felsics comprising 10-60% foids and alkali feldspar/total feldspar <0
Geoscience Ontology Description
Fine grained igneous rock than contains less than 90 percent mafic minerals, between 10 and 60 percent feldspathoid mineral in the QAPF fraction and has a plagioclase to total feldspar ratio greater than 0.5. Includes rocks classified in QAPF field 13 and 14 or chemically in TAS field U1 as basanite or tephrite.
