Geologic column dating

Some of the information is technical and I have tried to provide references and links for the more difficult portions of the text in order to help any reader go beyond the material presented here.There is no shortage of criticism of the radiometric dating technique by young Earth creationists.A fossil can be studied to determine what kind of organism it represents, how the organism lived, and how it was preserved.However, by itself a fossil has little meaning unless it is placed within some context.These changes typically occur so slowly that they are barely detectable over the span of a human life, yet even at this instant, the Earth's surface is moving and changing.As these changes have occurred, organisms have evolved, and remnants of some have been preserved as fossils.The geological column is the theoretical classification system for the layers of rocks and fossils that make up the Earth's crust (also known as the standard geologic column).Fossiliferous layers can often be traced across entire continents and correlated with rocks in other countries.

Mountains have been built and eroded, continents and oceans have moved great distances, and the Earth has fluctuated from being extremely cold and almost completely covered with ice to being very warm and ice-free.The ten strata systems that geologists use (Cambrian, Ordovician, Silurian, Devonian, Carboniferous, Permian, Triassic, Jurassic, Cretaceous, and Tertiary) compose the "standard geologic column" and are claimed by many to contain the major proof of evolutionary theory.Several erroneous notions have been attached to the geologic column. The geologic column was constructed by geologists who, because of the weight of the evidence that they had found, were convinced of the truth of uniformitarian theory and organic evolution.During the same interval of time in another part of the world, the land surface subsided and was covered by the seas.With the sinking of the land surface, sediments were deposited on the ocean floor.For example, based on the primate fossil record, scientists know that living primates evolved from fossil primates and that this evolutionary history took tens of millions of years.

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