Feeding patternsThese swirly patterns were made by living organisms at the bottom of the sea approxi
Feeding patternsThese swirly patterns were made by living organisms at the bottom of the sea approximately 250 million years ago while they were feeding on an organic matter mixed within the sediment. The pictured sediments were buried by more sediments, hardened and eventually brought to the surface by tectonic processes without messing up such signs of ancient life. South coast NSW, Australia -- source link
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