Proceeds from the sale of Dino Girl fossils are used to fund my grand-daughter's education. She is finishing up high school and will be entering college to get a degree in Paleontology. Everyone has called her "Dino Girl" since she dug up her first dinosaur bone in my backyard at the age of 4. It has been her lifelong dream to become a Paleontolgist since then. I'm her "Papa Dino" and that's the story of Dino Girl:) This Orthoceras fossil in black limestone matrix was excavated in the Atlas Region of Morocco in the late 2000?s. Dates from 200 to 500 Million years ago during the Ordovician to Triassic periods. Provenance: Ex. Joseph Aaronson Collection.This Orthoceras fossil in black limestone matrix was excavated in the Atlas Region of Morocco in the late 2000?s. Dates from 200 to 500 Million years ago during the Ordovician to Triassic periods. Provenance: Ex. Joseph Aaronson Collection. Orthoceras are fossilized remains of extinct nautiloid cephalopods, often found in the Atlas Mountains of Morocco. These ancient creatures lived during the Ordovician to Triassic periods, from 500 to 200 million years ago. They are notable for their long, straight, conical shells and are considered ancestors of modern squids and octopuses.