Curriculum Collections: Solve a Sedimentary Layers Puzzle

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Cross-bedding in Sandstone

ERN Item Type: 

  • Classroom Activities


American Museum of Natural History (AMNH)


Scientists often determine the correct sequence of sedimentary rock layers using the fossils found within them. They compare the fossils to figure out if two layers are from the same geologic time period, or if one layer is older than the other. Try reconstructing the layers using the same strategy.

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