Metamorphic rock
Is rock
That is changed
By its environment
Into another type
Of rock.

This is not
Like weathering
It is instead
Compression
Deep under ground
When the rocks
Sleep.

Hot rock
Bends
And changes
But does not melt
Unless it is really hot
Then it is
Igneous rock.

Metamorphic rock
Can be other rocks
Before
But now it is different
Though
Igneous rock
And
Sedimentary rock
Metamorphosed
Still
Are different.

Geology

Rocks
Don't last forever.
They change.

Some rocks
Become soil.
Other rocks
Are pushed underground
And come back
As new types of rock.
Either way
The original rock
Is gone
For good.

Rocks
Don't come back
The way they were.
But we can learn
From what they were
Before they were
What they are
Now.

This is
Geology.