Directions: Study all the rules stated and identify whether the situation depicts a characteristic found in either volcanic rock, plutonic rock or neither. Write your answer in the blank provided.
Rules:
1. Plutonism is the formation of igneous rock within the crust. This form plutonic/intrusive igneous rocks. Volcanism is the formation of igneous rock from magma exposed to the surface of the crust. This forms volcanic/ extrusive igneous rocks.
2. The location of rock formation contributes to the temperature cool down rate (faster on extrusive rock than intrusive rock). This makes extrusive rock seems sturdier on the field exploration than intrusive rock, which breaks down quickly when exposed to weathering factors on the surface.
3. Mafic rocks is made of heavier elements and usually darker, while Felsic rocks
is made of lighter elements and usually lighter in color.
4. The percentage of silica is independent to plutonism or volcanism.
5. Not igneous/ Not enough information
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1. A geologist was puzzled upon discovering a rock with high amount of silica, heavy, and dark. In contrary, scratch test suggests it is not that hard.
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2. You discover a rock layer during an escavation. It is sturdy, heavy and uniform dark in texture. You asume that it could be an old lava field.
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3.” I am a rock from a marine trench. The undersea pressure is very high, and my proto-material was immediately exposed to hydrosphere. What rock am I?”
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4. A fallen rock came from an outcrop which is a rock stratum. The rock is durable, heavy and white. There are tiny fossil corals and shells on it.
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5. A rock is fine crystals growing on the rock bed. It was found on a mountain outcrops with no volcano around.
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Answer:
rock steady ok learning is fun you now you can answer it by your self ok
Explanation:
ok ok ok ok