Judyneed Posted February 13, 2016 Share Posted February 13, 2016 (edited) I found this rock in my yard, near Detroit Michigan. I have never seen anything like this. To me, it looks like a seashell. The image is flat. The texture of image is very smooth. And appears to be covered in clear film. What is this? Edited February 13, 2016 by Judyneed Link to comment Share on other sites More sharing options...
sTamprockcoin Posted February 13, 2016 Share Posted February 13, 2016 partly broken open "concretion" or accretion. “Beautiful is what we see. More beautiful is what we understand. Most beautiful is what we do not comprehend.” N. Steno Link to comment Share on other sites More sharing options...
Auspex Posted February 13, 2016 Share Posted February 13, 2016 To me, it looks like chert. "There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant “Try to learn something about everything and everything about something.” - Thomas Henry Huxley >Paleontology is an evolving science. >May your wonders never cease! Link to comment Share on other sites More sharing options...
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