Fossil record dating assumptions
If these strata allegedly represent billions of years, how did the tree survive long enough [without rotting] to become fossilized? The first few slices show jellyfish, worms and trilobites; the next shows fish; then amphibians and early reptiles; then dinosaurs; then mammals; and finally man. We have fish that died in the act of eating another fish…According to Answers in Genesis: The volcano sent mud and debris hurtling down into Spirit Lake, sloshing a wave nearly 900 feet (300 m) up its initially tree-studded slopes.The wave sheared off trees with enough lumber to make all the houses in a large city!It could be something as simple as a run away script or learning how to better use E-utilities, for more efficient work such that your work does not impact the ability of other researchers to also use our site.
They checked assumptions and methods behind evolutionary claims about mass extinctions in earth history.
The problem is a phenomenon known as the Signor-Lipps effect: Because the fossil record is incompletely sampled, the last-known fossil of a given species is almost certainly not the last member of that species, which muddles our ability to date extinctions. Things can happen that speed up or slow down the fossilization process at a given site.
Applied on large scales, the Signor-Lipps effect can make a mass extinction appear gradual. Taken at face value, the cores presented a dramatically distorted record of both the timing and tempo of extinction, potentially calling into question some of the methods paleontologists commonly use to interpret past mass extinctions.
“But it’s more complicated than that,” these scientists warn. Climatic cycles trigger changes in sea level, causing shorelines to advance or recede and driving changes in environments.
A beach may become a mudflat, for example, or a delta can turn into a coastal plain.