Use the image below. Which fossil is a good example of an index fossil?

Question

O Gastropod because it appears in multiple layers (long period of time) and in 3 columns (multiple areas)
• Trilobite because it only appears in one layer (limited time) and in one column (single area.
• Ammonite because it appears in only 1 layer (limited time) but in 3 columns (multiple areas.
• Gastropod because it appears in multiple layers (long period of time) and in 3 columns (multiple areas

Answer 1

Based on the given information, the Gastropod fossil is a good example of an index fossil. It appears in multiple layers, indicating a long period of time, and in three columns, indicating multiple areas.