{"thcode":4,"term":{"code":"4.4.5","name":"Alkali-feldspar syenite","parent":"4.4","scope":"A plutonic rock defined in the QAPF diagram as having Q\/(Q+A+P) < 20% or F\/(F+A+P) < 10%, and P\/(P+A) < 10%..."},"uf":[],"bt":[{"code":"4.4","name":"Granitoid","parent":"4","scope":"A general term for all phaneritic igneous rocks dominated by quartz and feldspars."},{"code":"4","name":"Plutonic rock","parent":"0","scope":"A rock formed at considerable depth by crystallization of magma and\/or by chemical alteration.  It is characteristically medium- to coarse-grained, of granitoid texture."},{"code":"0","name":"Earth material","parent":null,"scope":"Geologic map unit classification (Bruce R. Johnson) version 6.2: A hierarchical classification of earth materials for digital geologic maps."}],"nt":[],"rt":[]}