Mbh 3.221.1b

Force and scent arose from his pus; the Deodar pine from his bones; glass from his phlegm; the Marakata jewel from his bile; and the black iron from his liver. And all the world has been embellished with these three substances (wood, stone and iron). The clouds were made from his nails, and corals from his veins. And, O king, various other metals were produced from his body. Thus leaving his material body, he remained absorbed in (spiritual) meditation. He was roused by the penance of Bhrigu and Angiras. The powerful fire thus gratified with penance, blazed forth intensely. But on beholding the Rishi (Atharvan), he again sought his watery refuse. At this extinction of the fire, the whole world was frightened, and sought the protection of Atharvan, and the gods and others began to worship him. Atharvan rummaged the whole sea in the presence of all those beings eager with expectation, and finding out the fire, himself began the work of creation. Thus in olden times the fire was destroyed and called back to life by the adorable Atharvan. But now he invariably carries the oblations of all creatures. Living in the sea and travelling about various countries, he produced the various fires mentioned in the Vedas.