The Avalon Explosion

Neoprotozoic era

The Avalon Explosion

Life before the Cambrian Explosion

575 to 565 Ma

The Avalon Explosion

Discovery

Fun facts

Fossils were found that pre dated the cambiran, scientists had to create new thories.

Late Ediacaran Period

The Avalon Explosion is the only era of trisymetric organisms

Like many scientific developments, the idea took a lot of proof

An evolutionary boom!

https://www.science.org/doi/10.1126/science.1150279 https://www.youtube.com/watch?v=Jpi2VJj5PhY https://palaeos.com/proterozoic/neoproterozoic/ediacaran/ediacaran.html

How was this event discovered?

A man found a jelly like fossil that was dated to be too early for the Cambrian Explosion, sonobody took him seriously at first. Then, more fossils were found from before the Cambrian. A kid stumbled across a fossil later called charnia that convinced scientists to start looking into previously ignored fossils. There was another find on the Avalon peninsula in Canada, where there were thousands of fossils from this time (video).

Fun Facts!

• The Avalon Explosion was the first and only appearance of trisymetrical organisms
• Charles Darwin belived there to be diversity of life before the Cambrian long before it was discovered
• There are only about 270 defined specied that have been found

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Pre Cambrian Fossils

Some fossils found dating to this time, or organisms alive include rangeomorphs, charnia, cimorella, and spirigina. diacaran (video). When it was not an ice age, the Ediacaran was warm/hot and relatively dry. And evidence of a warm, humid climate in higher latitudes. (paleos.com)

The Avalon Explosion

The most likely theory is the same as the Cambrian Explosion as they both have a similar evolutionary pattern. Various environmental, ecological, and developmental factors could account for the sudden increase in diversity in both cases.