Precambrian time covers the vast bulk of the ... developing a solid crust and oceans created from water vapor in the atmosphere. Many scientists think these primordial seas gave rise to life ...

Paleontologists now know that the Precambrian actually did swarm with ... which eventually washes out to the ocean and becomes sedimentary rock. And even those rocks, made partly from carbon ...

In a study published in Precambrian Research Monday by scientists ... further restricted and even cut off this section of water from the global ocean to create a nutrient-rich shallow marine ...

The fine, bright orange particles that settle on the ocean floor are the product of ... called deep-sea vents release dissolved iron into Precambrian waters, oxygen is used up as quickly as ...