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Most people accept the current old-earth OE age estimate of around 4.

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This age is obtained from radiometric dating and is assumed by evolutionists Strip clubs syracuse provide a sufficiently long time-frame for Darwinian evolution.

And OE Christians theistic evolutionists see no problem with this dating whilst still accepting biblical creation, see Radiometric Dating - A Christian Perspective. This is the crucial What are the strengths and limitations of relative age dating Some claim Genesis in particular, and the Bible in general looks Whxt from this standpoint. A full discussion of the topic must therefore include the current scientific challenge to the OE concept.

This challenge is mainly headed by Creationism which teaches a young-earth YE theory. A young earth is considered to be typically just 6, years old since this fits the creation account and some dating deductions from Genesis.

The crucial point here is: Here we outline some dating methodsboth absolute and relative, that are widely accepted and used by the scientific community.

Absolute dating supplies a numerical date whilst relative dating places events in time-sequence; both are scientifically useful. This is based upon the spontaneous breakdown or decay of atomic nuclei. Radioactive parent P atoms decay to stable daughter D atoms e.

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The time required for half the original number of parent atoms to xating is called the half life. Some half-lives are listed below:. It follows that uranium-lead, potassium-argon K-Arand Rubidium-Strontium Rb-Sr decay can be used for very long time periods, whilst radiocarbon dating can only Kendricks auto body augusta ga used up to about 70, years.

The K-Ar method is often used for rock dating. 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. Using radiometric techniques, the oldest dated minerals 4.

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One problem with earth dating is that the original earth surface is assumed to have sgrengths long ago. But assuming the earth was formed at the time of the rest of our solar system, then recovered moon rock and meteorites can also be used to estimate the age of the earth. These estimates give 4.

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These techniques utilize the physical parameters of the earth, such as ice cores, annual lake sediments, and astronomical cycles. Ice cores from Greenland and Antarctica show annual layers varves and datnig be traced up to about 40, years before the layers become too thin due to compaction.

Similarly, annual lake sediments can be used to estimate relative age and conventional interpretation for the Green River varves suggests they have been formed over some 20 million years. This What are the strengths and limitations of relative age dating the earth is at least 20 million years Oasis massage therapy camp hill. Astronomical cycles can also be used to measure relative age.

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The earth precesses wobbles like a spinning top around the sun in a series of cycles. These cycles affect sunlight and hence long-term can dsting layers in rock. 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 million years.

Here we outline a few dating methods or 'clocks' that present a dating anomaly when referenced to the widely accepted OE age of 4.

They appear to be inconsistent with an old earth. At the hhe we note C cannot be used to directly date the earth for the simple reason that the unstable C isotope has a half-life of just 5, years. In other words, half of the radioactive isotope in a sample would have decayed to Nitrogen N in just 5, years.

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C dating of carbon-bearing materials is therefore limited to roughly 50, years. But YE scientists point out some anomalies in relation to C and a very old earth. For instance, measurable amounts of C have been found in fossil material, such as coal traditionally Carboniferous period c mya. What are the strengths and limitations of relative age dating fact, organic samples from every portion Date questions to ask a guy the Phanerozoic record spanning the last million years on OE dating show detectable amounts of C The implication is that this organic material was either contaminated by new C, or it was buried much more recently and OE dating methods are suspect.

One early approach was based upon ocean salinity [John Joly, 's]. Strdngths assumed the ocean was initially pure water and that it's salinity was derived from continental erosion.

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The technique gave 90 million years, but took no account of the non-constant erosion rate, or the loss and recycling of salt, or the fact that salt is obtained from other sources as well as continents.

More recently, work has been done on ocean sediments [S. Nevins, Institute for Creation Research].

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This suggests that, given the current annual rates of erosion some Clearly, this seems incompatible with an ocean billions of years old. However, this may be a simplistic computation since there is Sediment Recycling as sediments accumulate and Whwt continental plates to collide, resulting in land uplift and subsequent errosion.

The Earth's magnetic field is thought to arise from circulating electic currents in the Earth's molten metalic core, and scientists agree that the field is weakening.

At the current rate of decline it could take just 1, years to disappear, with increasing effects upon the electronic systems of satellites and spacecraft. Magnetic field decrease applies to other planets. For instance, recent satellite measurements show that Mercury's magnetic field is rapidly decaying and YE Creationists claim this indicates a young field.

OE scientists believe that a weakened magnetic field could herald a new magnetic pole reversal.

Magnetic pole reversals are rebutted by YE creationists. Instead they claim that the field decrease can be used as a clock to date the earth since it has been decaying since the origin ae the earth. Taking the half-life of the decaying magnetic moment at yearsthe field is now only about one third as strong as it was at the time of Christ. Working further back in time, the value of the earth's magnetic field approaches that of a magnetic star at 10, years ago.

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Since this would need a huge nuclear power source, it seems magnetic field decay places an upper age limit on the earth of the order of 10, years.

Whilst the rigour of this YE theory is disputed see talkoriginsrecent spacecraft observations have confirmed its planetary magnetic predicions made in ! The decay of uranium and thorium isotopes results in a net build-up of Helium-4 atoms in the atmosphere. It is claimed to be increasing at an annual rate of 3. Faul][Nature , M. From these figures and known decay rates, it can be shown that the current amount of atmospheric Helium can be generated in just What are the strengths and limitations of relative age dating, rslative not billions of years.

Short-period comets orbit the sun in less than What are the strengths and limitations of relative age dating the Halley comet orbits about every 76 years. Each time they come close to the sun they lose material the comet tail and disintegrate.

If no new comets are being generated Best japanese online dating sites, it would appear that no short-period arre can survive more than about 10, years - implying a young earth.

This claim is countered by the fact that the origin of short-period comets is still uncertain and that there may be a source of short-period comets e.

This is perhaps one of the Armenian sexy women challenging anomalies for OE science.

It is claimed that Homo sapiens appeared sometoyears ago. But doesn't it seem strange that after more thanyears earth's population is still only 7 billion? After all, the population increased from 1 billion in to 7 billion in - a span of just years!

Of course, population growth is exponential, but even then the numbers don't add up. Some claim a world-wide catastrophe may have occurred around 70, years ago, reducing the human population to maybe just 1, breeding pairs.

Let's do the maths on these 'catastrophe' figures. Sexy babes uk course, there are many factors that Indian adult match Gumerliya discreet Tucumcari women r, such as climate, disease, war, standard of living and so on.

Typically, population growth rates are between 0. In words, earth's population should be some million, billion, billion, billion. This an impossibly large number when compared to the earth's current 7 billion people. Either the population growth calculation is hopelessly wrong, or the theory of human evolution is suspect!

Relative dating is the science of determining the relative order of past events without dating, archaeologists and geologists used relative dating to determine ages of . Layers of sediment do not extend indefinitely; rather, the limits can be . Dating: Steno's Laws, Radioactivity, and Geologic Time Laws and apply that knowledge to determine the relative ages of geological strata and fossils therein,; Know the benefits and limitations of relative and radiometric dating methods, and . This allows the relative age of fossils in sedimentary rocks to be determined The limitation of relative dating of fossils is that it does not give actual dates of.

This computation appears much more realistic. Earth dating via ocean sediments, magnetic field decay, atmospheric helium, short-period comets and other techniques point to a young earth. However, the scientifc accuracy of YE claims are frequently challenged e. Talk Origins.

In order to balance the discussion we should also challenge datig currently accepted radiometric dating methods. If these are suspect then the disputed methods take on more meaning. There are datung causes for concern. The K-Ar method dates rocks by measuring the accumulated Ar It is claimed the advantage of this method is that it circumvents the zero date problem i. In other words, all Ar in a rock is assumed to have been produced by in-situ radioactive decay of K within the rock since it formed What are the strengths and limitations of relative age dating there was zero Ar in the rock when it solidified.

However, this primary assumption has been challenged e. This 'zero Ar' problem Mail order brides ireland also been identified by Snelling who comments for one research project:. Certainly it is known to diffuse easily from deeper rocks under pressure so surface rocks tend to have a higher Ar concentration than would be expected.

This, coupled with the fact that potassium is easily washed out of minerals, suggests this strenghhs can give an artificially high age for the earth and leads some to conclude that:. If we question these techniques, there is an alternative method called isochron limjtations. What are the strengths and limitations of relative age dating

The isochron dating method attempts to combat the zero date problem by using ratios of isotopes and samples of different minerals from the same rock. However, it still relies on certain basic assumptions, and in particular on the assumption that the telative was entirely homogenous when it formed i. The method also assumes that all mineral samples will have the same hte Sr to Sr ratio, but this is not always the case.

So whilst isochron dating can give a straight line, the slope may have no significance [Vardiman et al]. What about the radiometric assumption of constant decay rate?

Such an assumption rests on the old evolutionary concept of uniformitarianism.