GEO 101 Lecture Notes - Lecture 5: Heat Transfer, Flux Melting, Intrusive Rock

• School: University of Alabama
• Department: Geological Sciences
• Course: GEO 101
• Professor: William Lambert

Document Summary

Geology chapter 4: igneous rocks: hawaii has mostly all igneous rocks, lava- (cid:373)olte(cid:374) (cid:396)o(cid:272)k that has flo(cid:449)ed out o(cid:374)to the ea(cid:396)th"s su(cid:396)fa(cid:272)e, magma- (cid:373)olte(cid:374) (cid:396)o(cid:272)k (cid:271)e(cid:374)eath the ea(cid:396)th"s su(cid:396)fa(cid:272)e. Igneous rock- one of the three main rock types, the others being sedimentary and metamorphic. Igneous rock is formed through the cooling and solidification of magma or lava (granite comes from magma, and rhyolite comes from lava) Aphanitic- a textural term for fine-grained igneous rocks. Mineral grains are too small to see with the naked eye (microscope needed). Phaneritic- a textural term for course-grained igneous rocks. Mineral grains are large enough to see with the naked eye (microscope not needed). Porphyritic- a textural term for igneous rock that has phenocrysts distributed throughout a finer matrix. I(cid:374)di(cid:272)ates t(cid:449)o stages of (cid:272)ooli(cid:374)g; la(cid:396)ge(cid:396) (cid:272)(cid:396)(cid:455)stals (cid:862)g(cid:396)e(cid:449)(cid:863) at depth, (cid:271)ut (cid:271)efore molten rock had solidified, a volcanic eruption brought the material to the.