Other uses incude non-reactive blanket in the manufacture of titanium and other reactive elements and as a protective atmosphere for growing silicon and germanium crystals.Argon-39 has been used for a number of applications, primarily ice coring. Argon is also used in technical SCUBA diving to inflate the drysuit, due to its nonreactive, heat isolating effect.The effect of simple asphyxiant gases is proportional to the extent to which they diminish the amount (partial pressure) of oxygen in the air that is breathed.
Both the physical geologists and paleontologists could point to evidence that much more time was needed to produce what they saw in the stratigraphic and fossil records.
As one answer to his critics, Kelvin produced a completely independent estimate -- this time for the age of the Sun.
In earth's atmosphere, Ar-39 is made by cosmic ray activity, primarily with Ar-40.
In the subsurface environment, it is also produced through neutron-capture by K-39 or alpha emission by calcium.
Other factors and basic assumptions must also be considered.
Of course, Kelvin formed his estimates of the age of the Sun without the knowledge of fusion as the true energy source of the Sun.Mental alertness is diminished and muscular coordination is impaired.Later judgment becomes faulty and all sensations are depressed.Death may result from errors in judgment, confusion, or loss of consciousness which prevent self-rescue.At low oxygen concentrations, unconsciousness and death may occur in seconds without warning.The Martian atmosphere in contrast contains 1.6% of Ar-40 and 5 ppm Ar-36.