The missing fossils argument; the Avalon explosion (Introduction)

by David Turell , Friday, October 11, 2024, 18:01 (11 days ago) @ David Turell

In the Ediacaran period before the Cambrian:

https://evolutionnews.org/2024/10/fossil-friday-the-avalon-explosion-and-the-power-of-m...

"This Fossil Friday features the 569-556-million-year-old frond-like fossil Charnia from Charnwood Forest in Leicestershire (UK), an example of the abrupt appearance of the so-called Ediacaran biota in the latest Precambrian. During this event, which has been called the Avalon Explosion and preceded the famous Cambrian Explosion, we find in three distinct assemblages the emergence of strange organisms that looked like aliens from a remote planet. They were very much unlike any of the organisms that roamed our planet after the Cambrian Explosion and certainly did not represent the ancestors of the Cambrian bilaterian animal phyla. The Ediacaran organisms generally exhibited a quilted body like an air mattress, a glide symmetry, a fractal growth pattern, and lacked any visible organs for feeding or locomotion or any internal structure. A genuine enigma for biologists and paleontologists.

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"...the authors simply suggest that “major transgressions would therefore both increase habitable shallow marine shelf area and also drive long-term increases in environmental oxygen levels, which culminated in the appearance of the Avalon, White Sea, and Cambrian assemblages.” As I have often said, these are at best describing necessary conditions for the appearance of new organisms but certainly not sufficient conditions. There is zero causal explanation for the astonishing culmination in the appearance of the totally new types of organisms that characterize these assemblages. The new study was published in the prestigious journal Science Advances, but did it really advance our understanding of the mechanisms responsible for the sudden origin of the Ediacaran biota? The answer must be a resounding no, not even a single bit. While evolutionary biology has no explanation even according to the authors themselves, intelligent design theory does uniquely provide a causally adequate explanation and therefore should be preferred over the blind acceptance of Darwinian magic as an imposed default explanation."

Comment: firstly, clear gaps that have never been filled in. Secondly, his other point is quite clear, that favorable conditions are not drivers of innovations. That is the province of DNA actions