The Ediacaran fauna are fossilized multi-cellular organisms that were formed by moving sands washed over mud flats, creating the shape in figure 1.
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| Figure 1. The Shape that was formed by an Ediacaran Fauna |
These existed from about 600 million years ago to approx. 545 million years ago. The fauna has now been found on all continents except Antarctica.
It is difficult to state the main planetary effect on the conditions with organisms, communities and ecosystems. However huge changes was occurring at the end of the Precambrian and the start of the Early Cambrian stages. From rising sea levels creating shallower waters, there was a fluctuation in carbon dioxide levels meaning changes in ocean chemistry as well as nutrient crisis all making it harder for The Ediacaran Fauna
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