Some days ago, I saw this rock in a ravine, Dayi County, Sichuan, China.
But, I don't know what it is, does anyone know this?
I also found brachiopod and tabulate corals fossils in that ravine.
I found this fossil imprint (that's probably not the right terminology) on a rock last month in northern Michigan. It measures 2" x 2", and in places there seems to be a honeycomb pattern. What's with the tubular piece?