Earth Science · Geology · Earth Interior / Principles and Exploration
Fossil evidence and continental fit — principles and investigation
The fact that the same fossils are found on separate continents is a clue to inferring past continental connections. Move and rotate continental pieces and compare how the fossil distribution bands connect. This is an activity that examines whether multiple independent pieces of evidence support the same layout, rather than just the shape of the coastline.
How does it work?
The arrangement of the distribution of multiple fossils together supports the continental connection hypothesis better than a single outline.
Different fossils match → evidence of past connections
Try this investigation
- Move other continents closer based on Africa. Use drag or select/position sliders and rotation buttons. Snap to confirm the connection and connect the five continents.
- Execute and record the connected arrangement and check the connection judgment of the four types of fossil bands.
- Compare fossil evidence that records the conditions that separated South America or rotated India.
Interpreting your results
What evidence supports the past continental layout?
Mesosaurus and Cynognathus show the connection between South America and Africa, Lystrosaurus shows the connection between Africa, India, and Antarctica, and Glossopteris shows the connection between the five continents.
Assumptions and limitations
This is a puzzle where you fit the five continents into a fixed educational layout. The outline, belt, and location are greatly simplified and are not actual latitude, longitude, or coastline. Fossil evidence alone does not allow us to determine the time and speed of movement and its unique actual arrangement.