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GEOG landscapes and water
first midterm flashcards - chapters 11 and 12
28
Geography
Undergraduate 1
02/07/2010

Additional Geography Flashcards

 


 

Cards

Term
Olivine Crystal Arrangement
Definition
Isolated Crystal Arrangement
Term
Pyroxene Crystal Arrangement
Definition
Single Chain Crystal Arrangement
Term
Amphibole Crystal Arrangment
Definition
Double chain Crystal Arrangement
Term
Mica  Arrangement
Definition
Sheets
Term
Feldspar Arrangement
Definition
3D framework
Term
Quarts Arrangement
Definition
3D framework
Term
What are the six main families of silicate minerals?
Definition

(in order of silica content from lowest to highest)

Olivines, Pyroxines, Amphiboles, Micas, Feldspars, and Quarts

 

Mnemonic: Obese Peculiar Amphibians Mummify Fruit Quietly

Term
Silica Content of Olivines
Definition
Lowest Silica Content
Term
Silica Content of Pyroxenes
Definition
Second Lowest Silica Content
Term
Silica Content of Amphiboles
Definition
Third Lowest Silica Content
Term
Silica Content of Mica
Definition
Third highest silica content
Term
Silica content of feldspars
Definition
second highest silica content
Term
silica content of quarts
Definition
highest silica content
Term
melting point of olivines
Definition
highest melting point
Term
melting point of pyroxenes
Definition
second highest melting point
Term
melting point of amphiboles
Definition
third highest melting point
Term
melting point of mica
Definition
third lowest melting point
Term
melting point of feldspars
Definition
second lowest melting point
Term
melting point of quarts
Definition
lowest melting point
Term
What is the color of Olivines and are they ultramafic, mafic, or felsic
Definition
Olivines are green (like an olive) and they are ultramafic
Term
what is the color of pyroxenes and are they ultramafic, mafic, or felsic?
Definition
Pyroxenes are dark colored and they are mafic
Term
What is the color of amphiboles and are they ultramafic, mafic, or felsic?
Definition
Amphiboles are generally dark colored but can range in color from colourless to white, green, brown, black, blue, or lavender and they are mafic.
Term
What color are micas and are they ultramafic, mafic, or felsic?
Definition
Micas are dark to light in color and they are mafic
Term
what is the color of feldspars and are they ultramafic, mafic, or felsic?
Definition
Feldspars are light colored and felsic
Term
What is the color of quarts and is it ultramafic, mafic, or felsic?
Definition
Quarts is light in color and is felsic.
Term
List the six silicate mineral families in order of density from least dense to most dense
Definition
Olivines, Pyroxenes, Amphiboles, Mica, Feldspars, Quarts
Term
Would a mafic mineral be more likely to be high in Fe+/Mg content or K+/Na content?
Definition
Fe+/Mg content (think basalt coming out of the asthenosphere/mantle also think high melting point of mafic = deeper in the earth
Term
Would a felsic mineral be more likely to be Fe+/Mg rich or K+/Na rich?
Definition
K+/Na rich, differentiate by knowing that something iron/magnesium rich would have a higher melting point and would be mafic
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