[leewong]

Originally Posted by Glenzig [You must be logged in to view images. Log in or Register.]

◾Beginning at the base of the Cambrian period and extending for about 10 million years, all the major groups of skeletonized invertebrates made their first appearance in the most spectacular rise in diversity ever recorded on our planet. ◾Salvador E. Luria, Stephen Jay Gould and Sam Singer, A View of Life, pp. 638.

◾Geologists have discovered many unaltered Precambrian sediments, and they contain no fossils of complex organisms. ◾Salvador E. Luria, Stephen Jay Gould and Sam Singer, A View of Life, p. 651.


Maybe the better question to ask is why and how very suddenly all of these complex skeletonized vertebrate animals appeared during the same exact geological period with no apparent evolutionary premise.

When a geologist says sudden they arent talking about minutes or hours or years. This period lasted about 53 million years or more. Suddenly is a very bad term to use when referring to it.