Question

multiple choice 2 point
on a field trip students found 2 different seashell fossils (fossil a, and fossil b) in the same rock layer 5 miles away from each other. which of the following is true about the 2 seashell fossils found in the same rock layer?
fossil b is most likely older than fossil a.
they most likely lived at the same time.
fossil a is most likely older than fossil b.
they most likely did not live during the same time.

Explanation:

Fossils found in the same undisturbed rock layer (stratum) follow the principle of superposition and original horizontality, which means they formed during the same geologic time period, so the organisms most likely lived at the same time.

Answer:

They most likely lived at the same time.