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Title: Cretaceous Marine scene
Caption: The Cretaceous Period was named for the chalk deposits laid down in warm shallow seas. This scene, from the Early Cretaceous (approximately 140 mya), focuses on the abundant invertebrate life present, including bivalves, ammonites (relatives of the Nautilus), belemnites (cuttlefish), sea urchins, starfish, gastropods, and crabs.
Credit: Album / Science Source / LAURIE O'KEEFE
Image size: 8146 × 2444 px | 57.0 MB
Print size: 69.0 × 20.7 cm | 3207.1 × 962.2 in (300 dpi)