Question

Stromatolites form when(1 point)
Responses

continents drift apart and isolate areas of the biosphere.

oxygen reacts with iron in rocky layers.

cyanobacteria grow on top of rocks and harden as others grow on top of them

volcanoes erupt and kill surrounding organisms.

Answers

Answered by GPT 3.5
cyanobacteria grow on top of rocks and harden as others grow on top of them
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