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Author Question: Mica and clay minerals have a platy crystal form because they have a sheet-like structure of silica ... (Read 99 times)

asmith134

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on: Jul 13, 2018
Mica and clay minerals have a platy crystal form because they have a sheet-like structure of silica tetrahedra.
  Indicate whether the statement is true or false

Question 2

____ are a type of lithostratigraphic unit with distinctive upper and lower boundaries.
 A)Biozones
 B)Stratotypes
 C)Formations
 D)Systems
 E)Zones


Expo

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Reply #1 on: Jul 13, 2018
Answer to Question 1

True

Answer to Question 2

C


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