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[[I don’t think that people fully appreciate the impact of the assumptions involved in a ‘scientific’ age estimate for either the universe or the earth.]]

Precisely- they FIT the evidences to match the a priori belief, and hteir support for fitting the evidences is based purely on assumptions- when discreprencies arise, or are discovered- such as evidence where it shouldn’t be, all maner of ‘explanations’ are given to discount the evidences- again,m based on nothing but assumptions- but again- here I go being ‘anti-science’ by exposing the assumptions that drive the various dating methods used to ‘determine’ ages beyond 5000 years:

Superposition
Not a valid dating method- too manyvariables must be taken into account- too many suppositions
http://www.fbinstitute.com/powell/evolutionexposed.htm

Stratigraphy
http://geoinfo.nmt.edu/publications/bulletins/135/home.html

Dendrochronology
Up to 10000 years tops

Radiometric Dating Methods
problems with radiometic http://www.specialtyinterests.net/carbon14.html

Obsidian Hydration Dating
Many obsidians are crowded with microlites and crystallines (gobulites and trichites), and these form fission-track-like etch pits following etching with hydrofluoric acid. The etch pits of the microlites and crystallines are difficult to separate from real fission tracks formed from the spontaneous decay of 238U, and accordingly, calculated ages based on counts including the microlite and crystalline etch pits are not reliable.”
http://trueorigin.org/dating.asp
http://www.scientifictheology.com/STH/Pent3.html

Paleomagnetic/Archaeomagnetic
Very little info on this method
http://ourworld.compuserve.com/homepages/dp5/tecto.htm

Luminescence Dating Methods
http://karst.planetresources.net/Kimberley_Culture.htm

Amino Acid Racemization
http://www.creation-science-prophecy.com/amino/

Fission-track Dating
http://www.ao.jpn.org/kuroshio/86criticism.html

Ice Cores
Varves
At best- the two methods above are only accurate to about 11,000 years due to numerous conditions and environmental uncertainties

Pollens
Corals
Highly unreliable- you’d need constant temps to maintaIN reliable growth pattersn http://www.answersingenesis.org/creation/v14/i1/coral_reef.asp

Cation Ratio
Fluorine Dating
http://www.present-truth.org/Creation/creation-not-evolution-13.htm

Patination
Known times only throuhg analysis of the patina
Oxidizable Carbon Ratio

Electron Spin Resonance
Cosmic-ray Exposure Dating
Closely related to the buggiest dating methods of Carbon dating

why it’s wrong:
http://www.cs.unc.edu/~plaisted/ce/dating.html#Carbon
http://www.creationontheweb.com/content/view/3059

RaDio helio dating disproves:
http://www.creationontheweb.com/content/view/369
http://www.cs.unc.edu/~plaisted/ce/
http://www.rae.org/