It's Geology (Harrison Schmitt)

What’s that stone in your hand
All the rocks that turn into sand
The cliffs that hold back the sea
The ground underneath your feet
What’s that mountain in front of me
It’s geology
The curtain rings (?) that carve up the land
The dust of the plough that helps us understand
How a piece of the sun that fell off and cooled down
Became the hills and the valleys that the rivers run down
What’s that sparkling on your finger
It’s geology
It’s geology
Why do we look on the ground
Why do we look to the sky
The stars and the planets are spinning around
All the stuff that’s held inside
It’s the reason that I’m going to the moon
It’s geology
It’s geology