http://resource.geosciml.org/classifier/cgi/lithology/foid_bearing_alkali_feldspar_trachyte
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| definition | Alkali feldspar trachytic rock that contains no quartz and between 0 and 10 percent feldspathoid mineral in the QAPF fraction. QAPF field 6'. | ||||||
| source | LeMaitre et al. 2002 | ||||||
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| in scheme | simplelithology original | ||||||