Chapter 26.2 Flashcards
(18 cards)
Define rock
naturally formed mixture containing minerals, rock fragments, and volcanic glass
How are rocks identified?
by their composition and texture
What does the texture of a rock describe about a rock?
the size, shape, and arrangement of the rock’s components
Where do intrusive igneous rocks form?
within the earths crust
What type of molten rock does intrusive igneous rocks form from?
magma
What is the name of the series that illustrates simultaneous crystallization of silicate minerals?
the Bowen’s Reaction Series
What are the 3 types of magma?
mafic, intermediate, and felsic
Which magma type has a low silica content?
mafic
Which magma type has a high silica content?
felsic
Which type of crust has an abundant amount of quartz? (oceanic or continental)
continental crust
Which type of crust has little to no quartz? (oceanic or continental)
deep locations in contental crust or with oceanic crust
Which type of igneous rock has a coarse grained texture?
intrusive igneous rock
Which type of igneous rock has a fine grained texture?
extrusive
Do fine grained rocks cool slowly or quickly?
quickly
What are the two specific texture types for extrusive igneous rock?
vesicular, porphyritic
Which texture is the type with holes left behind because of rapid cooling?
vesicular
Which texture is the type with two different crystal sizes because of different cooling rates?
porphyritic
What type of rock has a vesicular (holey) texture?
pumice
