Geography, 16.10.2020 14:01 dathanboyd
The Coeur d'Alene Mining District in Silver Valley, ID is known for its large lead deposits of the mineral galena (PbS). Galena is one of the few common minerals with a metallic luster that has a distinctive cleavage (cleavage is how a mineral breaks or parts along preexisting planes of weakness). Cleavage is described by the number of unique directions of cleavage planes and the angle between those planes. Which of the following best describes galena’s cleavage?
a. three directions at ~90°
b. three directions not at ~90°
c. two directions at ~90°
d. two directions not at ~90°
Answers: 2
Geography, 23.06.2019 11:30
Unlike other andean nations, chile has a relatively small population of mestizos people of european descent indians people of asian descent
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Geography, 23.06.2019 14:00
What statement about charlemagne is not true? a. charlemagne's empire collapsed during his rule b. charlemagne sent missionaries throughout europe c. charlemagne encouraged the arts and education d. charlemagne ruled much of western europe a. charlemagne's empire collapsed during his rule
Answers: 1
The Coeur d'Alene Mining District in Silver Valley, ID is known for its large lead deposits of the m...
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