I make the sharpest knives,
but I am not a metal.
I traveled far and wide
as people traded me.
As rocks go,
I do not last very long.
What am I?
as people traded me.
I do not last very long.
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Obsidian
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What did the boy volcano
say to the girl volcano?
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I really lava you!
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I can launch “bombs”
but I’m not a missile.
I can form a mountain
but I’m not in the Himalayas.
I erupt but I do not have a bad temper.
What am I?
but I’m not in the Himalayas.
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Shield Volcano
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I am common on Earth but very rare on the Moon.
I form most of the continental crust.
I am very hard to break,
even with a hammer.
What am I?
even with a hammer.
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Granite
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Why should you always
be patient with a geologist?
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They all have their faults.
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I am the oldest rock
EVER found on Earth.
Which igneous rock
AM I?
AM I?
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I am NOT an igneous rock! I am the Murchinson Meteorite.
I landed in Australia in 1969. I am about 7 billion years old —
much older than the Earth or Sun —
mere youngsters compared to me.
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I form a type of crust.
On the surface,
I am the oldest and most mature.
Am I quite continental
or do I prefer the land beneath the seas?
I am the oldest and most mature.
or do I prefer the land beneath the seas?
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Continental, of course.
It tends to be much older.
Oceanic crust is constantly created at the mid-oceanic ridge
and recycled at the subduction zones.
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I am a rock
but I can float on water!
What am I?
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Pumice
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Why are geologists
so good in school?
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They take nothing for granite.
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