8A50.34 - Geological Timeline and Fossils - Earth

Photo Credit: http://andyckh.deviantart.com/art/Geological-Timeline-Chart-283922560
Photo Credit: http://andyckh.deviantart.com/art/Geological-Timeline-Chart-283922560
Code Number:
Demo Title:
Geological Timeline and Fossils - Earth
Age of the Earth & Eras
Area of Study:
Solar System
Continuous Rolls of Adding Machine or Computer Paper.

Roll out a piece of paper of the proper length, and measure and label the eras.

We have some fossils that are quite good including dinosaur poop, petrified wood, some nautiloid cephalopod isorthoceras from Graf, Iowa, and some Devonian age coral that is 400 million years old from the Devonian Gorge in Iowa City, IA, all courtesy of our fossil gathering friends in the Physics Department and the Science Ed. Department.


  • Richard E. Zeebe and Lucas J. Lourens, "Solar System Chaos and the Paleocene–Eocene Boundary Age Constrained by Geology and Astronomy", Science, Vol. 365, #6456, Aug. 2019, p. 926.
  • Janice VanCleave, "Time Line", Dinosaurs for Every Kid - Easy Activities That Make Learning Science Fun, p. 46 - 49.
  • Nicole Wetsman, "Pale Blue Blip", Popular Science, Spring 2020, p. 8.
  • Steven I. Dutch, "Earth", 2003 Science Supplement (Spring), ISBN 0-7172-1575-x, Grolier Incorporated, p. 306 - 322.

Disclaimer: These demonstrations are provided only for illustrative use by persons affiliated with The University of Iowa and only under the direction of a trained instructor or physicist.  The University of Iowa is not responsible for demonstrations performed by those using their own equipment or who choose to use this reference material for their own purpose.  The demonstrations included here are within the public domain and can be found in materials contained in libraries, bookstores, and through electronic sources.  Performing all or any portion of any of these demonstrations, with or without revisions not depicted here entails inherent risks.  These risks include, without limitation, bodily injury (and possibly death), including risks to health that may be temporary or permanent and that may exacerbate a pre-existing medical condition; and property loss or damage.  Anyone performing any part of these demonstrations, even with revisions, knowingly and voluntarily assumes all risks associated with them.