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OpenStudy (anonymous):
What exactly is a Stromatolite?(other than the first sign of life on earth)
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OpenStudy (anonymous):
a calcareous mound built up of layers of lime-secreting cyanobacteria and trapped sediment, found in Precambrian rocks as the earliest known fossils, and still being formed in lagoons in Australasia.
OpenStudy (anonymous):
Is that good?
OpenStudy (anonymous):
so wat is it? a big mound of bacteria?
OpenStudy (anonymous):
yes pretty much
OpenStudy (anonymous):
ok thnx!:D
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