Fossils in canada dating earth

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The elements with the greatest and smoothest variation across and between teeth are yttrium (Y) and the REE.Any of these could be used to track post-fossilization modification, but Y is selected because it is present at higher concentrations than most REE and lacks redox sensitivity or fractionation effects.In the Alberta suite, the opposite trend is observed, and the system appears more complicated.Yttrium concentrations higher than in unfossilized teeth suggest enrichment did occur, likely during fossilization, but low concentrations of elements such as strontium suggest depletion occurred afterward. Fw-300 #ya-qn-sort h2 /* Breadcrumb */ #ya-question-breadcrumb #ya-question-breadcrumb i #ya-question-breadcrumb a #bc .ya-q-full-text, .ya-q-text #ya-question-detail h1 html[lang="zh-Hant-TW"] .ya-q-full-text, html[lang="zh-Hant-TW"] .ya-q-text, html[lang="zh-Hant-HK"] .ya-q-full-text, html[lang="zh-Hant-HK"] .ya-q-text html[lang="zh-Hant-TW"] #ya-question-detail h1, html[lang="zh-Hant-HK"] #ya-question-detail h1 /* Trending Now */ /* Center Rail */ #ya-center-rail .profile-banner-default .ya-ba-title #Stencil . Bgc-lgr .tupwrap .comment-text /* Right Rail */ #Stencil . Fw-300 .qstn-title #ya-trending-questions-show-more, #ya-related-questions-show-more #ya-trending-questions-more, #ya-related-questions-more /* DMROS */ .Teeth were chosen because they are surrounded by enamel, a finer-grained, more compact material that may make teeth more resistant to modification by passing fluids than bone.

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Significant variations in trace elements are measured both between teeth from the same strata and across individual teeth.

This raises the possibility that trace element modification occurring after fossilization is short-lived enough to record the precise timing of these events – and therefore a hint at their causes.

Most fossils analyzed record dates younger than the age of the host strata.

student studying the evolution of the deep lithosphere as sampled by the Jericho kimberlite, with the Australian Research Council Centre of Excellence in Core to Crust Fluid Systems and Macquarie University.

But what if fossils could also provide clues about what happened in the Earth system after fossilization?

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