Use the image below. Which fossil is a good example of an index fossil?
(1 point)
Responses
Gastropod because it appears in multiple layers (long period of time) and in 3 columns (multiple areas)
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).
Trilobite because it only appears in one layer (limited time) and in one column (single area).
Gastropod because it appears in multiple layers (long period of time) and in 3 columns (multiple areas)
Gastropod because it appears in multiple layers (long period of time) and in 3 columns (multiple areas)
Ammonite because it appears in only 1 layer (limited time) but in 3 columns (multiple areas).
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)
The image below is not provided, so I cannot directly determine which fossil is a good example of an index fossil. However, I can guide you on how to determine which fossil could be considered an index fossil.
To identify an index fossil, you need to look for certain characteristics. Index fossils are typically used to determine the relative age of rock layers and correlate them across different locations. They are widespread geographically but have a limited time range. Therefore, to identify an index fossil:
1. Look for a fossil that appears in multiple rock layers. Index fossils should be found in multiple layers, indicating a long period of time in which they existed.
2. Check if the fossil is present in multiple areas or columns. Index fossils should be found in different geographical locations or sections, suggesting that they are a reliable indicator of a specific time period.
3. Identify the fossil with a limited time range. Index fossils should only be present in a particular time period, allowing geologists to accurately date the rock layers in which they are found.
Based on the given response options, the correct answer would be:
Trilobite because it only appears in one layer (limited time) and in one column (single area).
Remember, without the image, it's challenging to provide a precise answer. It would be helpful to have the image to make a more accurate determination.