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Title: Banded Iron Formations are interbedded iron oxides and chert that formed on the sea floor between 3. Post by: drelog on Dec 8, 2015 Banded Iron Formations are interbedded iron oxides and chert that formed on the sea floor between 3.5 and 2 billion years ago because ________.
A) outgassing produced both chert and iron oxide in roughly equal amounts and the oceans became saturated with them B) chert was being deposited by bacteria and iron was a common ocean deposit C) iron was using the oxygen produced by bacteria and chert was a common ocean deposit D) photosynthesis had not yet started to generate oxygen so iron and chert were the deposited on the sea floor E) iron and chert were very abundant in the early earth Title: Re: Banded Iron Formations are interbedded iron oxides and chert that formed on the sea floor betwee Post by: Pulsa on Dec 11, 2015 Content hidden
Title: Re: Banded Iron Formations are interbedded iron oxides and chert that formed on the sea floor between 3. Post by: drelog on Dec 15, 2015 Exactly what I needed, exam is tomorrow!
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