Dickinsonia costata (Ediacaran fossil) (Ediacara Member, Rawnsley Quartzite, near-uppermost Neoproterozoic; Flinders Ranges, South Australia) 1

            Dickinsonia costata Sprigg, 1947 in quartzose sandstone from the Precambrian of Australia. (SAM P13750/P40679, South Australian Museum, Adelaide, Australia) (~7.7 centimeters long)

Soft-bodied macroscopic fossils have long been known from upper Neoproterozoic (Ediacaran) rocks, but they continue to generate much excitement among geologists.  Biologic interpretations of Ediacaran organisms have been all over the map.  Many Ediacaran fossils appear to be animals, but some paleontologists have interpreted them as lichens or giant protists or members of an extinct kingdom.
 
One of the quintessential examples of an Ediacaran fossil is Dickinsonia.  Prima facie, it appears bilaterally symmetrical, but it does have subtle asymmetry.  It has the general appearance of a flattened worm with a stretched pancake body.  This Dickinsonia specimen is from the Flinders Ranges of South Australia, one of the world’s classic localities for Ediacaran fossils.  As do most Ediacarans, Dickinsonia displays soft-part preservation in a matrix of clean, quartzose sandstone.

Stratigraphy: Ediacara Member, Rawnsley Quartzite, near-uppermost Neoproterozoic

Locality: Flinders Ranges, South Australia

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Taken on: August 16, 2006

Tags:

Dickinsonia

Ediacara

Precambrian

Neoproterozoic

South

Australia « less

Sets appears in: • Australia Rocks, Minerals, Fossils • Rawnsley Quartzite (Ediacaran; South Australia) more » • Neoproterozoic Rocks & Fossils • Ediacaran Fossils (Neoproterozoic) • Dickinsonia costata (Ediacaran fossils) (Ediacara Member, Rawnsley Quartzite, near-uppermost Neoproterozoic; Flinders Ranges, South Australia) « less

Groups appears in: • Earth Science Teaching Resource

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