Question

Imagine a scientist is studying a sedimentary rock formation that spans the three most recent geologic eras. Rock layers from each era are present in the rock formation. In what order, from top (closest to the surface) to bottom (deepest), should the scientist expect to find layers from each geologic era?

Answer 1

Answer:

Top- Cenozoic (youngest)

Medium- Mesozoic

Bottom- Palaeozoic (oldest)

Explanation:

The geological time scale is usually referred to as the ordered arrangement of major geological events that has taken place in the past. It is comprised of 3 distinct geological eras, namely the Palaeozoic, the Mesozoic and the Cenozoic.

Of these 3 eras, the oldest is the Palaeozoic (about 540 to 250 million years ago), followed by the Mesozoic (about 260 to 66 million years ago), and lastly is the Cenozoic (about 66 ,million years to present). All these 3 eras are characterized by the presence of fossil assemblages, that helped the geologists in constructing the geological time scale.