High Quality Content by WIKIPEDIA articles! Astrodon was a large genus of herbivorous sauropod dinosaur, related to Brachiosaurus, that lived in what is now the eastern United States during the Early Cretaceous period. Palynomorphs have been used to date the Arundel Formation to the Aptian-Albian boundary, which is about 112 million years ago. Adults are estimated to have been more than 9 m (30 ft) high and 15 to 18 m (50 to 60 ft) long.

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