Based on the information provided in the statement and typical stratigraphy concerning the geological timeline:
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The fossils of dinosaurs are younger than the mammal fossils. This is because mammals evolved after the dinosaurs dominated the Earth.
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The fossils of dinosaurs are older than the trilobite fossils. This is because trilobites existed in earlier geological periods, specifically during the Paleozoic Era, well before the age of dinosaurs.
So, to complete the statement:
"Evidence in the diagram, Fossils In Rock Layers, can be used to determine that the fossils of dinosaurs are younger than the mammal fossils and older than the trilobite fossils."