A fossil is any preserved remains, impression, or trace of any once-living thing from a past geological age in sedimentary rocks.
Index fossils (also known as guide fossils or indicator fossils) are fossils used to define and identify geologic periods . Index fossils must have a short vertical range, wide geographic distribution and rapid evolutionary trends.
Zone fossil is used when the fossil has all the characters stated above except wide geographical distribution, they are limited to a zone and can't be used for correlations of stratas.
We are going to work with different fossils and at the end of our study we will create a biostratigraphy.
We have already worked on two kingdoms: Monera and Protista. Now you are going to discover the characteristics of the other 3 Kingdoms: Plants, Fungi and Animalia.
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