Strata Essay In the diagram given, fossil "C" is the oldest out of fossil "B" and "A"mane they were all found in sedimentary rock. In between each fossil there were events that occurred that left layers behind, like a volcanic explosion. From this diagram, you can predict the relative ages of each strata and fossil. Before fossil "C", there was volcanic ash, then A layer of sedimentary rock, then more volcanic ash. The volcanic ash shows there were two volcanic irruption's, but they weren't right after one another they were separated by sedimentary rock. That shows there was a lot of time for the dirt, sand, etc to lithify and become strata. After fossil "C", A layer of glaciation is above it. The layer of glaciation shows that the temperature
