Author Question: Why do silicate ions cement into quartz as they rise toward the surface? A) The pressure ... (Read 22 times)

V@ndy87 · **on:** Jul 16, 2018

Why do silicate ions cement into quartz as they rise toward the surface?

A) The pressure decreases.
B) The temperature decreases.
C) They come into contact with the other ions they need to precipitate.
D) They get access to air as they near the surface.

Question 2

Why is calcite such a common sedimentary cementing material?

A) Calcite precipitates and forms cement readily at depth due to elevated temperatures.
B) Calcite is very common.
C) Calcite dissolves in water faster than halite does.
D) Calcite is the most abundant material in the earth's crust.