why do scientists study sedimentary rock layers
  Scientists study layers of rocks to learn about the earth and how it has changed. They know that if layers are undisturbed, the oldest rocks are on the bottom and the yo â¦ ungest rocks are on top.They know how old each layer is in relation to the other layers.+ 12 others found this useful. Scientists study layers of rocks to learn about the earth and how it has changed. They know that if layers are undisturbed, the oldest rocks are on the bottom and the yo â¦ ungest rocks are on top. They know how old each layer is in relation to the other layers. + 12 others found this useful.
Chemical oceanographers study the chemical composition of the water and floors of the oceans. Marine geologists are concerned with the minerals found in sea beds. Marine geophysicists also study the structure of ocean floors and the layers of rock found beneath the floors.