Questions tagged [geochronology]
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Why are there unnamed Cambrian Stages?
What is it about Stages 2,3,4, and 10 (as well as Series 2) in the Cambrian Period that has left solely them unnamed? Will this be resolved in time, or is it a relic of the historical naming process, ...
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Ages of the Andean Cordilleras
What is the timing of the rise of the Andes, especially if focused on the chronosequence differences among (Western, Central, Eastern) Cordilleras uplift.
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How exactly did Patterson determine the parameters in his Pb–Pb geochron equations?
In his famous paper Age of meteorites and the earth (1956), Patterson uses the following expressions:
Which I assume are the same as:
$$ \left(\frac{Pb^{206}}{Pb^{204}}\right)_P = \left(\frac{Pb^{...
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How should core-rim detrital zircon ages be reported in a sedimentary provenance study?
I understand this might be drifting into the black hole of subjectivity but I would like to know if anyone knows if there is a generally accepted practice. If one has a detrital zircon with a core age ...
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Can zircons be analysed by the (U+Th)/He after being ablated for analysis of U-Pb?
I have zircons that have been mounted in a resin block. They have been polished to approximately half way through the zircons (as is convention) and they have been ablated to attain the U-Pb or Pb-Pb ...
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