The assumption that there was little free oxygen in the earth's first atmosphere is supported by evidence derived from the study of
A)ancient iron-containing rocks.
B)the ancient atmosphere.
C)oceanic sediments.
D)moon rocks that formed at the same time as the earth.
E)none of these.

Question

Quizplus · Accepted Answer

The presence of iron-containing rocks that formed in the absence of free oxygen is evidence that there was little free oxygen in the earth's early atmosphere.

The Assumption That There Was Little Free Oxygen in the Earth's