Trace Fossil Evidence for Late Ordovician Animals on Land

  title={Trace Fossil Evidence for Late Ordovician Animals on Land},
  author={Gregory J. Retallack and C. R. Feakes},
  pages={61 - 63}
Fossil burrows within newly recognized buried soils in the Late Ordovician Juniata Formation, near Potters Mills in central Pennsylvania, represent the oldest reported nonmarine trace fossils. They are thought to have been an original part of the soil because their greater density toward the top of the paleosols corresponds with mineralogical, microstructural, and chemical changes attributed to ancient weathering and because about half the burrows are encrusted with nodular carbonate… Expand
Scoyenia burrows from Ordovician palaeosols of the Juniata Formation in Pennsylvania
Scoyenia beerboweri is a new ichnospecies of burrow from the late Ordovician (Ashgill) Juniata Formation in central Pennsylvania, USA. The burrows are abundant in red calcareous palaeosols, and wereExpand
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Neoproterozoic to subtrilobite Cambrian strata in the Mackenzie Mountains, Canada, provide a test case for the current paradigm of evolutionary stages in the development of the early infauna. ThreeExpand
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Fossil Soils as Grounds for Interpreting the Advent of Large Plants and Animals on Land
A little-explored line of evidence for the antiquity and nature of early vegetation on land is the soils in which they grew. Vegetation is one of a number of factors known to play an important roleExpand
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