A stromatolite resembles an onion in that it is composed of multiple fine layers laminations In a living stromatolite where in

Question

A stromatolite resembles an onion in that it is composed of multiple fine layers laminations In a living stromatolite where in this structure is the bacterial matt O in the middle layers only protected from the outside environment O for every layer there is a corresponding matt Oon the bottom layer only on the top layer only

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