These and many other obvious processes are leading many geologists to construct a global flood model for earth history.
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.
The simplest form of isotopic age computation involves substituting three measurements into an equation of four variables, and solving for the fourth.
The equation is the one which describes radioactive decay: If one of these assumptions has been violated, the simple computation above yields an incorrect age.
The Tippecanoe Sequence also covers much of North America and may well extend into Europe and Africa.
These eras are divided into periods, the system of which was established by the middle of the last century.However, the methods must be used with care -- and one should be cautious about investing much confidence in the resulting age...especially in absence of cross-checks by different methods, or if presented without sufficient information to judge the context in which it was obtained.Extremely widespread strata blankets argue for an intercontinental or global flood.The Sauk Sequence extends throughout North America and appears to extend into Europe.