Question

this diagram shows fossils in an undisturbed sedimentary rock sequence. shallower deeper which of the following fossils is oldest? select the most likely answer. fish ammonite wood

Explanation:

Step1: Recall the principle of superposition

In undisturbed sedimentary rock layers, the oldest layers are at the bottom (deeper) and younger layers are on top (shallower).

Step2: Identify the fossil's layer depth

The ammonite fossil is in the deepest layer (the bottommost layer) among the three fossils' layers. The fish is in a layer above the ammonite's layer, and the wood is in a layer above the fish's layer. So the ammonite's layer is the oldest, making the ammonite the oldest fossil.

Answer:

B. ammonite (assuming the ammonite option is labeled as such, with the ammonite image and text "ammonite")