Based on the trilobite fossil, what can you infer about the rock layers in these location? Layer a is 500 million years old. Layer a is the same age at each location. Layer a us made of indigenous rock. Layer a is younger than layer b.

Layer a is 500 million years old.

Explanation:

Trilobite is a member of the group of extinct arthropods found as fossils and they can be identified by the three-lobed as well as three segmented forms. These were the marine animals. These were appeared initially in the Cambrian Period. They used to live 542 million years ago so the fossils can be estimated to be aged of 500 above years old. These animals used to dominate in the sea area.