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
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Why is terracing used in southeast asian agriculture?
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Rah is completing a school project on the expansion of fast food restaurants across the united states. she finds a map that shows a clear pattern of restaurants beginning in the east and expanding west. this map was most likely created using the technology of
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Geography, 24.06.2019 00:30, naomicervero
What are three similarities between medc countries and ledc countries?
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The Coeur d'Alene Mining District in Silver Valley, ID is known for its large lead deposits of the m...
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