These things had come from Mesozoic gymnosperms and conifers-especially Cretaceous cycads-and from fan-palms and early angiosperms of plainly Tertiary date.
Zura Mesozoikoko gimnosperma eta koniferoena (batik bat Kretazeoko zikadofitoena) eta Tertziarioko palmondo eta lehenengo angiospermena zen.