- soft white bread
- paper clips
- other objects
Were some things fossilized in greater detail than others? Why?
- Place a piece of bread on a table - this is the mud at the bottom
of the pond.
- Place some of your creatures (paper clips, leaves, etc.) on the bottom
of the pond (the bread).
- More mud is swept into the pond and settles over the objects (add
another slice of bread)
- Repeat steps 1-3 a couple more times.
- SQUISH the sandwich with your hand. This is similar to sediment getting
squished by heavy sediment above it.
- Now pull apart the layers and look at how things are preserved.
Discuss: In what ways is this fossil sandwich not realistic?
Main Message: This exercise shows how fossil organisms and their impressions
are formed within layers of sediment. It also shows that some objects
are better preserved than others.
Connections: Activity 4, Gorge Dessert, provides
a tasty example of rock layering, while Activity 7,
Ice Age Mud from an Ancient Pond, will help reveal what really