How To Use Ordovician period In A Sentence

• Many crinoids are primarily nocturnal but they are seen during the day with their arms rolled up. living fossil existing virtually unchanged from the ancestors in the geologic age known as the Ordovician Period, but there are many more fossils formed from the Paleozoic Era. CreationWiki - Recent changes [en]
  0 0
• Like I said, he knows more about the Ordovician period than I do, so he was quite content to dig a few holes and admire the clam shells and petrified "seaweed" that we found. Day in the Life of an Idiot
  0 0
• Mason is excited because we might find things that were alive in the Ordovician Period ... and, like, he could instantly name three or four creatures alive then. Day in the Life of an Idiot
  0 0