Answer:
What measures out time until in time all is smashed to it?
It's usually found dried, but often kept slicker. Above another need, it's said to be thicker. What is it?
The stack just might be sent all over. Full of what's new, yet it's nearly obsolete.
I usually wear a yellow coat. I usually have a dark head. I make marks wherever I go.
You saw me where I never was and where I could not be. And yet within that very place, my face you often see.
I saw the dead bring forth the living. I saw the living bring forth the dead. What did I see?