Treptichnus pedum: Earliest widespread complex fossil body.
Anthropoda: Invertebrate, exoskeleton, segmented body.
From the Cambrian period of the Paleozoic Era 500 million years ago.
Stones used to build this wall @ Clinch Mountain overlook. They stay “still”.
I have not studied geology since Mr. West’s 8th grade Earth Science class. Please advise of corrections required. Thanks to Wikipedia for the science jargon refresher!
NOTE: Fossils are not good examples for illustrating I Ching concepts. I Ching is an elegant text on changes and transitions in life. The time interval for changes are more aligned with days and seasons than with hundreds of millions of years. I choose these images because of the detail, movement and abundance of ocean life which was trapped and “kept still”.
elfcroft 
Very Nice ♥♥♥ Beautiful Shots
Thank you!