In a sequence of rock layers we find trilobite fossils at the bottom of the rock sequence and dinosaur fossils directly above the trilobite fossils.We conclude that
A)trilobites survived up to the time of the dinosaurs.
B)the beds are overturned.
C)the processes of erosion created a gap between the age of trilobites and the age of dinosaurs.
D)dinosaurs fed on trilobites.

Question

Quizplus · Accepted Answer

This is an example of an unconformity, where erosion or other geological processes have created a gap in the rock record. The trilobite fossils are older than the dinosaur fossils, but there is no evidence that the trilobites survived up to the time of dinosaurs or that the beds are overturned. It is also unlikely that dinosaurs fed on trilobites as they are vastly different organisms from different time periods.

In a Sequence of Rock Layers We Find Trilobite Fossils