| 11. | Nevada's trace fossil record from the Pleistocene is very rich.
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| 12. | Several attempts to classify trace fossils have been made throughout the history of paleontology.
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| 13. | Preserved tracks and burrows are examples of trace fossils ( also called ichnofossils ).
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| 14. | The worms left behind trace fossils like tubes and borings.
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| 15. | While stratigraphic sequence is still preserved even after that, the trace fossil is not.
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| 16. | Vertebrates are known from both body fossils and trace fossils.
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| 17. | These trace fossils are usually divided into macroborings and microborings.
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| 18. | The traces do not resemble younger trace fossils, he said in a telephone interview.
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| 19. | Trace fossils are associated with many Burgess Shale-type deposits.
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| 20. | Once thought to represent a trace fossil, it is now recognized as a body fossil.
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