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Q: How does index minerals help geologists?
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What are index and what do geologists learn from them?

Index fossils are very important to geologists because they identify geological. The fossil snail is a particularly difficult animal to study.


Why are index useful to geologists?

they tell the absoute age of rcoks which they occur


How do index minerals help geologist?

Index mineral represents its presence over a large area for a specific period of time. So it helps the geologist to find out the time period.


What are two examples of index minerals?

kyanite and sillimanite


What methods did geologists use when they first developed the time scale?

The methods the geologists used when they first developed the geologic time scale. Were studying rock layers and index fossils worldwide. By Patrick