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Different species of ammonites lived at different times within the Mesozoic, so identifying a fossil species can help narrow down when a rock was formed.
Correlation can involve matching an undated rock with a dated one at another location.
Some of the most useful fossils for dating purposes are very small ones.
For example, microscopic dinoflagellates have been studied and dated in great detail around the world.
This holds that the modern human physique first appeared in Africa about 150,000 years ago, and then spread into the rest of the Old World, replacing existing populations of archaic human forms.”: 1. “Proof beyond any doubt” applies to outcomes and repeatability, not to guesses and mathematical, mental, or otherwise artistic constructs.
Theory which relies on poor or bad evidence does not fall within the realm of true science – it falls under the category of .
Some fossils, called index fossils, are particularly useful in correlating rocks.
This is, after all, science’s place, to use available tools and instruments to try to date artifacts and bones and stones by means other than conjecture and legend. It is also worth the time to say a few things about science in general before proceeding.Throughout the history of life, different organisms have appeared, flourished and become extinct.Many of these organisms have left their remains as fossils in sedimentary rocks.For too many of them, proven or admitted problems with their systems also is not good enough for them to discard these ideas.Their mindset, the pragmatic mindset, which you can read “their excuse”, is that until one comes up with something better the authority, as they say, will stand. Our thesis, then, is that Science regarding origins – particularly regarding the beginnings of Man and the Universe – stands on little better footing than religion.
It too often relies on beliefs, oftentimes in what are actually wildly speculative, if not fairy-tale, “theories”, routinely based on meager evidence mixed with lots of conjecture.