@Herald,
You are quite incorrect again Herald. ALL radioisotope techniques have several "Calibration techniques". For example,using C14 for archeological dates and such natural things as corals,charcoal, plant material found in paleoresidences etc, we have a "close in calibration" using tree ring analyses and a newer calibration technique developd by Fairbanks et al in 2004.
Hers a cc of his paper and its a road map of C14 calibration. and a track of std dev. o the results (as derived from same labs, methods etc)
http://radiocarbon.ldeo.columbia.edu/pubs/2005Fairbanks+table.pdf<br />
The techniques that I use are about a dozen (each with a special application, sampling requirements, calibration, and quality control for duplicates, field blanks, "lab travel calibration' etc. I used to do U/Th?Pb techniques but I now use several COMMERCIAL LABS that do the analyses for me (the techniques are so uniform and data so routine, we don't even do our own analyses any more)
Im not criticizing any method. Im just annoyed that you don't understand that each method has a prescribed reuirement for materials that are commonly dated using that method.
In other words. We don't use C14 for geological and archeological material greater than 45K years (some say 50 but those dates are usually all funky). If I were sampling really young stuff Id use a backass method that relies upon the disequilibrium of U /Th. (One of the methods we use for oldest rocks can be used for some of the youngest). (87Rb/ 87Sr) is used for determining ages of metamorphic crystallization. But calibration involves correction for ubiquitous 87Rb in just about "everything"
(187Re/187Os) Rhenium/Osmium dating is very important to me because we use it in detecting ages and tracking SULFIDE ORES .
These are but a few of the 13 overlapping isotopic tricks beside C14.
There are many non radiogenic geochronological techniques . Many of these are relative age determination techniques and not all are specific calendar dates.
Fission tracking
Cosmogenic Details and "counts"exposure to 3He ,36Cl,10Be, 16Al
Thermoluminescence (This is especially good for archeological samples between 50K nd 800K years old)
Optical Luminescence -similar ages as bove
Flourine accretion. Bone will accept Flourine fom the environment s it converts from a Calcium Apatite to a Calcium FlouroApatite. Bones in the 500 to 25000 year intervals are pretty accurately dated using this reltive technique
Spin Resonance- This is good for samples 1.5 Million years or younger. Ive only seen data using spin resonance I have never taken part in any work using the technique. SO Im only recalling things from literature .
Tree rings and pottery hydrolysis re-crystallization,
Stratigraphy -Still, one of the best techniques to "Bracket" unknown dates.
Also, whenever something is just going on (like Hawaiian volcanoes) we do use CAMERAS to record n event rather than spend good money to do some radiological dating technique that we can just as well see happening right before our yes. That's why Ive always suspected the ICR techniques as fraudulent because they don't seem to apply any of the "common sense" field techniques.
1.When someone does a series of radiological sampling techniques at a single site, AND then doesn't let anyone of the science world review the techniques .
2.AND when they use different labs for totally different techniques but don't share the sampling data with the labs. (as ICR once did with samples they just sent to Georgia Tech Radioisotope lab).
3AND when they report out data with it being totally unreviewed or QA'd it kinda perks up my "honesty antennae".
I SUSPECT THEY ARE JUST PLYING GAMES because Creationists don't have any research they can do. They are functionally bound by their religious convictions and they NEED to find fault with science so they can destroy the science behind evolution. When you understand that, all else becomes clear.
Lots of non radiogenic