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harkovskaia [24]
3 years ago
13

A geologist discovers a sample of fine-grained rock made up of very small crystals. Based on its physical appearance, what can t

he geologist conclude about the rock?
A. It formed from magma that cooled slowly.
B. It formed from the remains of living organisms.
C. It formed from materials produced by living organisms.
D. It formed from magma that cooled quickly.
Biology
1 answer:
tensa zangetsu [6.8K]3 years ago
3 0

Answer:

D. It formed from magma that cooled quickly

Explanation:

From several experiments, geologists have come to terms with the fact that when magma cools rapidly, it does not give room for large and big sized crystals to form. Instead, tiny, little crystals would be formed.

For example, obsidian and most volcanic rocks.

When a magma has enough time to cool and solidify, we see very big crystals of minerals in them.

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The retention volume in chromatographic separation (Vr) is the volume of the mobile phase required to carry the solute through the column to elution, is related to the column flow (Fc) and the retention time (tr). Likewise, the volume of the mobile phase(Vm), is related to the flow and the time the void volume takes to pass through the column.

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