# The existence of inland saltwater lakes, such as [[Mono Lake]] and the [[Great Salt Lake]], suggest a recent global [[flood]]
# The plentiful supply of high concentrations of underground well water, which would be expected based on familiar principles of [[entropy]] to dissipate over a long period of time.
# The [[Earth]]'s [[magnetic field]] is changing at too fast a rate for the Earth to be old. It is weakening in strength by 5% every 100 years<ref>[http://image.gsfc.nasa.gov/poetry/tour/AAmag.html Earth's Magnetic Field and its Changes in Time], from [[NASA]]</ref>. [[Exponential decay]] at that rate is not compatible with an
old Earth, since it would have required the Earth's magnetic field to be impossibly large at the times postulated by old-Earth theory.
# Earthquakes alter the Earth's rotation every century; extrapolating by orders of magnitude in time would have resulted in the occurrence of much larger earthquakes that would have destabilized the rotation<ref>A similar analysis may be performed for the likelihood of devastating collisions with meteors as time is extrapolated by orders of magnitude.</ref>
# The lack of erosion between rock layers<ref>http://www.amazon.com/review/R1WTZL8GG4H9K0</ref><ref>http://www.knowthebible.net/id115.html</ref>
# Levels of contamination in water are rising, as water procedes through the [[water cycle]] it becomes progressively more contaminated. If earth (and life) had existed for billions of years, a limit would have long been reached where water (essential to life) was too contaminated for life to continue.
# [[Paraconformity]] and unconformity such as that seen at the [[Grand Canyon]] disprove the [[uniformitarianism (science)|uniformitarian]] view of earth history.
=== Biology ===