I collected this rock when picking up Devonian fossils in Clark County, Indiana. At the time I thought it might be a Phacops rana tail. L...

Here is a mounding stromatoporoid or calcareous sponge. Thanks to Dave for commenting on a early post telling me what this is. I found anot...

This fossil reminds me of stacks of pancakes or layers of paper. I am not sure if it is a coral or a sponge. It was found in a Devonian foss...