29.4 Precambrian Time—A Time of Hidden Life

Precambrian Time

For Your Consideration:

"Black-band ironstone (aka)" by André Karwath aka Aka - Own work. Licensed under CC BY-SA 2.5 via Wikimedia Commons - https://commons.wikimedia.org/wiki/File:Black-band_ironstone_(aka).jpg#/media/File:Black-band_ironstone_(aka).jpg

                                                                              Photo by André Karwath

What do banded iron formations have to do with photosynthesis?

Be sure to read this chapter section in your textbook!