We live on what used to be the bottom of the Champlain Sea not too far from the shore, I'm told. Around 300 million years ago, in the Ordovician period, there was a lot of marine life including cephalopods, similar to the squid, octopi and cuttlefish swimming around today. There are a couple of nice examples in the exposed limestone on our property.
I have no idea what specific kind of cephalopods these may be. There are all kinds of other little creatures in both of these pictures. My uneducated eye sees only things that look like they should be in the ocean. We're a long way from any salt water here so it's fun to go beachcombing in the backyard.
I wonder if a few hundred million years from now anyone will be trying to identify me?