In rock layers jellyfish fossils are found lower than trilobite fossils and trilobite fossils are found lower than ammonite fossils. What can be determined from this information?

From the information provided, it can be determined that jellyfish are older than trilobites, and trilobites are older than ammonites. This suggests a chronological order of these organisms in the fossil record, with jellyfish appearing first, followed by trilobites, and then ammonites. This pattern aligns with the principles of stratigraphy, where older fossils are found in lower rock layers.