I did admit to making a mistake on the river delta, but I have been doing research on those dating methods. I think that too much weight is placed in them. This article clearly states the problems with Ar/Ar, which does not require an initial isotope. The interesting part is as follows: http://geoinfo.nmt.edu/labs/argon/methods/home.html
"Standard Intercalibration
In order for an age to be calculated by the 40Ar/39Ar technique, the J parameter must be known. For the J to be determined, a standard of known age must be irradiated with the samples of unknown age. Because this (primary) standard ultimately cannot be determined by 40Ar/39Ar, it must be first determined by another isotopic dating method. The method most commonly used to date the primary standard is the conventional K/Ar technique. The primary standard must be a mineral that is homogeneous, abundant and easily dated by the K/Ar and 40Ar/39Ar methods. Traditionally, this primary standard has been a hornblende from the McClure Mountains, Colorado (a.k.a. MMhb-1). Once an accurate and precise age is determined for the primary standard, other minerals can be dated relative to it by the 40Ar/39Ar method. These secondary minerals are often more convenient to date by the 40Ar/39Ar technique (e.g. sanidine). However, while it is often easy to determine the age of the primary standard by the K/Ar method, it is difficult for different dating laboratories to agree on the final age. Likewise, because of heterogeneity problems with the MMhb-1 sample, the K/Ar ages are not always reproducible. This imprecision (and inaccuracy) is transferred to the secondary minerals used daily by the 40Ar/39Ar technique. Fortunately, other techniques are available to re-evaluate and test the absolute ages of the standards used by the 40Ar/39Ar technique. Some of these include other isotopic dating techniques (e.g. U/Pb) and the astronomical polarity time scale (APTS).
Decay Constants
Another issue affecting the ultimate precision and accuracy of the 40Ar/39Ar technique is the uncertainty in the decay constants for 40K. This uncertainty results from 1) the branched decay scheme of 40K and 2) the long half-life of 40K (1.25 billion years). As technology advances, it is likely that the decay constants used in the 40Ar/39Ar age equation will become continually more refined allowing much more accurate and precise ages to be determined.
J Factor
Because the J value is extrapolated from a standard to an unknown, the accuracy and precision on that J value is critical. J value uncertainty can be minimized by constraining the geometry of the standard relative to the unknown, both vertically and horizontally. The NMGRL does this by irradiating samples in machined aluminum disks where standards and unknowns alternate every other position. J error can also be reduced by analyzing more flux monitor aliquots per standard location.
39Ar Recoil
The affects of irradiation on potassium-bearing rocks/minerals can sometimes result in anomalously old apparent ages. This is caused by the net loss of 39ArK from the sample by recoil (the kinetic energy imparted on a 39ArK atom by the emission of a proton during the (n,p) reaction). Recoil is likely in every potassium-bearing sample, but only becomes a significant problem with very fine grained minerals (e.g. clays) and glass. For multi-phase samples such as basaltic wholerocks, 39ArK redistribution may be more of a problem than net 39ArK loss. In this case, 39Ar may recoil out of a low-temperature, high-potassium mineral (e.g. K-feldspar) into a high-temperature, low potassium mineral (e.g. pyroxene). Such a phenomenon would great affect the shape of the age spectrum."
I did some research on APTS and U/Pb. First APTS http://www.agu.org/pubs/crossref/1995/94GL03214.shtml This clearly states that to put dates with APTS (geomagnetic polarity time scale) they used Ar/Ar method of dating. But if K/Ar are not always accurate and they use other methods. One of the other methods, APTS, is based on dating done by Ar/Ar. http://geology.geoscienceworld.org/cgi/content/abstract/32/2/137 How is that not circular? This next article states that they need to recalibrate GPTS because of incorrect Ar/Ar dating and furthermore they need the dating to come out to match their adopted date of 65 ma at the KP boundry. U/Pb has significate problems with being a closed system. http://www.answersingenesis.org/creation/v4/i2/uranium.asp
I have not researched dendocrhonology (counting of tree rings, etc) so I will not comment on this until I'm prepared. I have not responded to you because I just don't believe anything that is said, for example the river delta, and am researching to make sure that the statements made by you and talkorigins are verified by other means. Yes I did link an article from answersingenesis and I'm searching for something secular views on the subject. I am truly interested in finding out correct answers, not assumed or half-baked points of view. You can call me what you want and say I'm a liar, but you really think I'm going to just take your word for it? I need your point of view so I can study the pieces that could change my mind. Second, please do not speak to me as if you know anything about me. I asked you some questions and said something incorrectly which I told you that it was incorrect. That was my mistake. And I told you right away that I was in error. What part of that is a lie? It was misinformation and I corrected it. You sir also regurgitate answers from your religion, talkorigins. Just because you're an atheist doesn't mean you don't have a religion.