Using clues to tell the story. Exploring for oil 2. Clues in the rocks and from the Earth today Page 5 Using clues to tell the rock story We can find out how the sediments that make up sedimentary rocks were formed by looking at sediment-forming processes today. We can learn even more by testing these processes using simulations . Here we are going to look at how limestones form.
Limestones are a common type of sedimentary rock.
Broken shells from the sea shell investigation. Figure 2.2 A shelly limestone . The white shells are clearly visible. The sea shell investigation You can put a collection of sea shells into a plastic container with a few small pebbles. If you shake the container hard for 15 seconds and pour out the results, they will look like the shells in figure 2.1.