A stratigraphic layer in one location overwhelmingly represents one species, while the same species is discovered in a similar stratigraphic layer hundreds of kilometers away. What method is used to provide an estimate of age for this layer and this species?

A. biostratigraphy
B. carbon 14
C. Steno’s law of superposition
D. Dendrochronology

Biostratigraphy

Explanation:

Biostratigraphy is a phenomenon that uses fossils that are used to find out the age of rock and the fossils. This is the success of the fossils sedimentary rock within the dis-positional basin.

The geologic strata interval is characterized by the fossils taxa. These fossils are defined by the first appearances and the first apparent extinctions of the abundances of the fossils taxa.

Thus here in the above context Biostratigraphy has been used to estimate the age of the layer and their species.