The Naked Scientists

The Naked Scientists Forum

Author Topic: how is amber dated?  (Read 7549 times)

paul.fr

  • Guest
how is amber dated?
« on: 14/06/2007 10:20:26 »
i would not imagine you could use carbon dating, so how do they date amber?


 

Offline dentstudent

  • Neilep Level Member
  • ******
  • Posts: 3146
  • FOGger to the unsuspecting
    • View Profile
how is amber dated?
« Reply #1 on: 14/06/2007 10:57:36 »
I don't know - when I asked her, she didn't want to go out with me....

It seems that radio-carbon dating can be used..
http://www.pgm.lt/Gintaras/butrimo_straipsnis.en.htm
 

Offline eric l

  • Hero Member
  • *****
  • Posts: 514
    • View Profile
how is amber dated?
« Reply #2 on: 14/06/2007 12:28:23 »
i would not imagine you could use carbon dating, so how do they date amber?
Amber is a petrified (= densified) resin from trees, it is still an organic compound containing carbon.  Carbon dating is definitely possible !
(For the composition :  check this link :  http://www.emporia.edu/earthsci/amber/physic.htm)
 

Offline ichnos

  • Jr. Member
  • **
  • Posts: 38
    • View Profile
how is amber dated?
« Reply #3 on: 14/06/2007 12:33:04 »
Radio carbon dating can not be used on "older rocks" i can't remember the exact age but anything older than a couple of Ma is not possible. the only methods u could use would be to a) get a rough evolutionary age from any insects etc trapped in the amber or b) dating the surrounding sediment in which the amber is found either by magnetostratigraphy or biostratigraphy... :)
 

Offline dentstudent

  • Neilep Level Member
  • ******
  • Posts: 3146
  • FOGger to the unsuspecting
    • View Profile
how is amber dated?
« Reply #4 on: 14/06/2007 12:54:59 »
This C14 website states that radio-carbon dating can be achieved up to -75,000 years, but obviously depends on the lab, and the degree of precision required. Normally up to 50 - 60,000 years is the limit.

http://www.c14dating.com/agecalc.html

No idea what happens for dating before this though. Is it radiometric?
 

Offline JimBob

  • Global Moderator
  • Neilep Level Member
  • *****
  • Posts: 6564
  • Thanked: 7 times
  • Moderator
    • View Profile
how is amber dated?
« Reply #5 on: 15/06/2007 05:00:39 »
Most often, amber is dated by dating the matrix rocks - the rock in which it is found. This yields a minimum age. Occasionally it is older than the surrounding rocks because it has eroded from the original deposit and been redeposited. This occurs in some Russian amber. The sediments in which it is found are in deltaic and riverine deposits, where erosion and redeposition is common.
 

The Naked Scientists Forum

how is amber dated?
« Reply #5 on: 15/06/2007 05:00:39 »

 

SMF 2.0.10 | SMF © 2015, Simple Machines
SMFAds for Free Forums