Methods of dating the earth
One early approach was based upon ocean salinity [John Joly, 1800's].This assumed the ocean was initially pure water and that it's salinity was derived from continental erosion.These estimates give 4.4-4.5 billion years for moon rock, and 4.54 billion years for iron metreorites.These techniques utilize the physical parameters of the earth, such as ice cores, annual lake sediments, and astronomical cycles.In fact, organic samples from every portion of the Phanerozoic record (spanning the last 500 million years on OE dating) show detectable amounts of C-14.The implication is that this organic material was either contaminated by new C-14, or it was buried much more recently and OE dating methods are suspect.In some cases these astronomical cycles in rock appear to have been laid down over some 25 million years (and radiometric dating puts the absolute age of the rock at some 200 million years).Dating Anomalies Here we outline a few dating methods or 'clocks' that present a dating anomaly when referenced to the widely accepted OE age of 4.6 billion years. At the outset we note C-14 cannot be used to directly date the earth for the simple reason that the unstable C-14 isotope has a half-life of just 5,730 years.
A young earth is considered to be typically just 6,000 years old since this fits the creation account and some dating deductions from Genesis.The time required for half the original number of parent atoms to decay is called the half life.Some half-lives are listed below: It follows that uranium-lead, potassium-argon (K-Ar), and Rubidium-Strontium (Rb-Sr) decay can be used for very long time periods, whilst radiocarbon dating can only be used up to about 70,000 years. This uses a simple exponential decay formula linking the original number, Po, of parent atoms in rocks and minerals to the P atoms now present, thereby enabling an estimate of geological age.This implies the earth is at least 20 million years old.
Astronomical cycles can also be used to measure relative age.But YE scientists point out some anomalies in relation to C-14 and a very old earth.For instance, measurable amounts of C-14 have been found in fossil material, such as coal (traditionally Carboniferous period c300 mya).Some claim Genesis in particular, and the Bible in general looks mythical from this standpoint.