Topics. A. What is the definition of igneses mest is this a pretic deftaition thaving io do woth origimi. or is it descriptive fhasing boda wich agpearaseeg? Whar in magama? What is lavat Where within Farth's interiok do magras eriginate ile, = fere does rok mely?? 8. What are sis kindr of pluanic (ietraive) insemas mok bolies? What are the thre farietien of volcanic (evtruaive) ifneous rick holice? C. What is there about the ie efperatuess of epseallimeten of vatiois miscriss that faiditatica evolution (change) in the compositice al a magrat D. What are the tho parancitr apqlied in the clasifkarian of iencous rocks? What teo things E. Why is it that subducton repelts in pantial meltieg? Why des partial melting selecthely. miobitioe maginas rieh in silica ietritedrap Hise does enrichancot of lava ia silica teinatiefra affect the peodile of valcanic cexes? fs dxere a conctabize hetwenen the degre of eirichment E. What are the criteria fir the idenificutice of iqneswa recas? A. Igneous rocks - their definition and origin Ienenese rucks defiant - Ly pown nats (Fron 1 ation igmis, firr) ans meds ifur lave ergitalliand form mininnek. A vined menapler for de arpallitiation of minerale widia malus nok in int: coptale foruing wibie water at e 5 . ( 124 ) 70 Igneous Rocks - retinnest .