Respuesta :
A limestone bed constituting fossils 550 million years old is older than a sandstone bed containing fossils 400 million years old. The correct option is c.
What is sandstone?
Sandstone is a sedimentary rock that is sometimes mostly composed of quartz sand, but it could also contain substantial amounts of feldspar, silt, and clay.
A limestone bed comprising fossils dating back 550 million years is older than a sandstone bed containing fossils dating back 400 million years.
Thus, the correct option is c i.e., older than.
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