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DSCN9503 overview from N DSCN9496 overview from S 33 Ice Age DSCN0838 32 Tertiary DSCN0867 30 Triassic 31 Jurassic-CretaceousDSCN0862 31 (2) Cretaceous DSCN0864 31 (1) Jurassic DSCN0863
30 (2) Jurassic29 Pennsylvanian-Permian 28 Devonian-Mississippian 27 Devonian 26 cambrian-ordovician 24 meteorites DSCN0875 22 solar system spheres 22 23 DSCN9502 solar system meteorites 23 meteorites