Geologic dating issues
In exploring geological time, we explore the history and evolution of life in all its incredible diversity, the drift of continents, the rising and erosion of mountains, and long term climatic cycles of greenhouses and ice ages.Scientists divide the Earth into a number of periods - the "Geological time-scale", according to the rock types and sort of fossils found in each one.
By definition, D* = N-1) (2) Now we can calculate the age if we know the number of daughter atoms produced by decay, D* and the number of parent atoms now present, N.These eras are divided into periods, the system of which was established by the middle of the last century.The periods are in turn divided into epochs, and the epochs are divided into ages called ages.Of course, there are many problems with such dating methods, such as parent or daughter substances entering or leaving the rock, as well as daughter product being present at the beginning.Here I want to concentrate on another source of error, namely, processes that take place within magma chambers.Then the paleontologists use the geologists' dates as evidence for the age of the fossils! The relative order of the strata was first determined by the principles of stratification. Beagle, a very strong Bible believer, made it a point to have a copy of Lyell's book for the ship's library.
(The principle of superposition was recognized as early as 1669 by Steno.) Reverend Benjamin Richardson and Reverend Joseph Townsend were a couple of early geologists involved in this work. Obviously, even Lyell was not pushing evolution at the time.
It's just one of the tricks that have been used to make the work a little more precise. I believe he has confused the use of index fossils with evolution.
One creationist editor, who is more mellow than his unfortunate statement suggests, phrased the argument thus: Unfortunately the geologists date the rocks as the paleontologists tell them to. That passage might have come out of one of Henry Morris' books, except that Morris usually avoids crude slander. Hovind is not aware of the fact that by 1815 the broad outlines of the geologic column from Paleozoic times onward had been worked out by people who were mostly geologists.
The Discovery of Deep Time Pre-modern concepts of Time Geology and the discovery of Deep Time Geology and the discovery of Deep Time - Reading List Geological Timescale Stratigraphy Radiometric dating Detailed Geological Timescale Precambrian Time Phanerozoic Eon Geological Time Units The Geon Planetary Timescales Lunar Geological timescale Martian Geological timescale Glossary References Quaternary Time Historical Time Although (as explained in the parent unit (more inclusive unit) of this topic) there are many possible timescales (which range from the very long (billions of years) to the very short) , Geological time, which deals in millions or tens of millions of years, is the main focus here at Palaeos.
Therefore this page provides the starting point for an overview of Earth history.
Most scientists today believe that life has existed on the earth for billions of years.