26/12/2022
How fun would it be to hear this recorded?
Rockin' around the Grand Canyon
It's 1.8 billion years from bottom to top.
Metamorphic schists way down deep,
Intruded by igneous rocks (or dikes).
Rockin' around the Grand Canyon
Where trilobite fossils cling.
Later we'll have crinoids too,
dragonflies, and fossil fern leaves.
You will be in sedimentary layers
When you hear,
Names like Tapeats, Bright Angel, Temple Butte..
Redwall Limestone, Surprise Canyon, Supai Group.
Rockin' around the Grand Canyon
Have a Happy Holiday.
Step back in time, merrily,
Before the rest erodes away!
—K. Stewart
NPS file photo of winter at Mather Point on the South Rim.