In his book The Genesis Record, Morris draws on a number of sources to establish his viewpoint.
In regards to the physical constants, Morris writes: "A longer chronology, which of course is needed to support the modern dogma of evolution, must be based on uniformitarian extrapolation of certain present physical processes. It should be recognized, however, that all such calculations necessarily must be based on a number of unproved and, as a matter of fact, untestable assumptions."(p. 44)
Actually, he doesn't seem to provide any other sources for his non-uniformitarian views other than the Bible itself and science. On pages 126 and 127 he writes:
"...Since all flesh is made of the earth's physical elements, it also is subject to the law of decay and death and as 'grass, withereth ... and falleth away' (I Peter 1:24). It is universal experience that all things, living or nonliving, eventually wear out, run down, grow old, decay, and pass into the dust.
This condition is so universal that it was formalized about a hundred years ago (by Carnot, Clausius, Kelvin, and other scientists) into a fundamental scientific law, now called the Second Law of Thermodynamics. This law states that all systems, if left to themselves, tend to become degraded or disordered. It has also been called the 'law of morpholysis' (from a Greek word meaning 'loosing of structure'). Physical systems, whether watches or suns, eventually wear out. Organisms grow old and die. Hereditary changes in species are caused by gene mutations (sudden random disruptions in their highly ordered genetic systems) which in many cases have resulted in deterioration or extinction of the species itself. Even apart from mutations, the deterioration of the environment has often led to species extinction.
Instead of all things being 'made' - that is, organized into complex systems - as they were in Creation Week, they are now being 'unmade,' becoming disorganized and simple. Instead of life and growth, there comes decay and death; instead of evolution, there is degeneration.
This, then, is the true origin of the strange law of disorder and decay, the universally applicable, all-important Second Law of Thermodynamics. Herein is the secret of all that's wrong with the world. Man is a sinner and has brought God's curse on the earth."
Other than this, he does make reference to another theologian's work as the most accurate Biblical chronology but he says this work was done way before Darwin or the advent of modern dating methods.
