PROBABILITY DISTRIBUTION OF ORGANIC MATTER ABUNDANCE IN INORGANIC ROCKS

It is shown by experience that the abundance of organic matter in inorganic rocks accords with the Γ-distribution,which is denoted as:where y is the probability density,x the organic matter abundance,6 the the minimum value of x,and a and β the parameters determining the patterns of the distribution curve,respectively.When the mean value of samples x and the standard deviation S are obtained,a and β can be defined by.