| 41. | However, most trace fossils are rather less conspicuous, such as the trails made by segmented worms or nematodes.
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| 42. | These left behind fragmentary skeletal remains like teeth and a few bones, as well as trace fossils like footprints.
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| 43. | Trace fossils are best preserved in sandstones; the grain size and depositional facies both contributing to the better preservation.
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| 44. | The organism was first interpreted as a trace fossil, and has also been considered to represent an agglutinating foraminiferan.
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| 45. | The trace fossil assemblages in the formation suggest that it was below the wave base and was reasonably well-oxygenated.
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| 46. | Brackish-water trace fossil assemblages occur within these bar deposits and demonstrate periodic incursion of marine waters into the estuaries.
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| 47. | We just haven't had the tools necessary to discover the fossil or chemical trace fossil evidence of this life.
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| 48. | Accordingly, researchers classify trace fossils into form genera, based on their appearance and on the implied behaviour of their makers.
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| 49. | Although these trace fossils are of debatable origin, some of them do resemble the trails made by living gastropods today.
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| 50. | Numerous trace fossils of dinosaurs have been found in the area and there is a Museum specialized in paleontology in Enciso.
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