The geological time scale indicates the order of eras is Cenozoic as the most recent; the middle era is the Mesozoic,with dinosaurs as the major group; and the earliest era is the Paleozoic.Consider a hillside of rock that surfaces in your backyard that is identified as dating back to the Mesozoic era.What is possible?
A)Fossils from all other eras can still be found underneath if you dig far enough.
B)All periods of fossils were once present in the backyard but older ones were eroded away.
C)Fossils were mainly deposited when your backyard was sediment,so many layers might be missing,but any layer from Cenozoic to Paleozoic might be found.
D)Fossils were mainly deposited when your backyard was sediment,so many layers might be missing,but any layer from earlier Mesozoic through Paleozoic might be found.
E)Only one layer of fossils can be found at any site.

Question

Quizplus · Accepted Answer

Since the hillside of rock surfaces in the backyard is identified as dating back to the Mesozoic era, it indicates that the backyard was sediment during that era, and hence fossils would have been deposited during that time. However, in the process of erosion and geological activities, many layers might be missing, but any layer from earlier Mesozoic through Paleozoic might be found. Therefore, it is possible to find fossils from earlier Mesozoic through Paleozoic eras in the hillside of rock in the backyard.

The Geological Time Scale Indicates the Order of Eras Is