📁 痕迹化石

遗迹化石，或称遗迹化石，是岩石记录中发现的动物活动的保存证据。它们的范围从恐龙脚印到蠕虫洞穴再到根系痕迹。此类别适用于任何处理痕迹化石研究的网站。

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International Tree Ring Laboratory

https://wwwuser.gwdg.de/~mworbes/

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The Ancient Bristlecone Pine - Dendrochronology

http://www.sonic.net/bristlecone/dendro.html

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Rocky Mountain Tree-Ring Research

http://www.rmtrr.org/

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Laboratory of Tree-Ring Research - University of Arizona

https://ltrr.arizona.edu/

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Fundamentals of Sample Age Determination from its Amino Acid Racemization

http://www.angelfire.com/linux/hortola/aminoeng.htm

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24 Hour Answers

http://www.24houranswers.com/

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A Star Maths and Physics

http://www.astarmathsandphysics.com/

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The Academic Advantage

http://www.academicadvantage.com/

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