Q.

‘Stromatolites’ are?

A. These are the sediments found in river beds containing silica.
B. These are the type of soil rich in nitrogen.
C. These are the layers of sediments buildup after crystallization of lava.
D. These are the trapped sediments found in Precambrian rocks as the earliest known fossils.
Answer» D. These are the trapped sediments found in Precambrian rocks as the earliest known fossils.
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