Sftuutxiu %M%mu. [June 25, 1892. 406 … CRETACEOUS PERIOD-BOTTOM OF CHALK SEA. iguanodon, which was one of the first reptiles to exhibit in the structure of its bones and the form of its legs and feet bird-like characteristics, was a ponderous monster, weighing several tons ! The Cretaceous or chalk period closed the Mesozoic era. At…
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