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findingdates.htm
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findingdates.htm
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"
"http://www.w3.org/TR/REC-html40/loose.dtd">
<HTML>
<HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
<META NAME="Author" CONTENT="Paul R. Sheppard">
<META NAME="GENERATOR" CONTENT="Mozilla/4.05 [en] (Win95; U) [Netscape]">
<META NAME="KeyWords" CONTENT="dendrochronology, tree ring, crossdating, skeleton plot">
<TITLE>Crossdating: Finding Dates</TITLE>
<LINK REL=stylesheet HREF="crossdatestyle.css" TYPE="text/css">
</HEAD>
<BODY>
<H1>Finding the Dates</H1>
After doing all of this:
<OL>
<LI>Skeleton plotting the core
<LI>Showing the master chronology
<LI>Matching the pattern of your skeleton plot with the master
</OL>
Now determine the actual dates of the virtual sample and consider possible <A HREF="applications.htm">paleoenvironmental applications</A><BR><BR>
<CENTER>
<TABLE>
<TR><TD>How to find the start and end dates:
<UL>
<LI>Assume that the virtual sample had 21 rings
<LI>The skeleton plot extends from line #0 to line #20, as on the right
<LI>The pattern matching with the master chronology is obvious
<LI>Therefore:
<UL>
<LI>The first ring (line #0 on the skeleton plot) corresponds to 1809
<LI>The last ring (line #20 on the skeleton plot) corresponds to 1829
<LI>Year dates of formation of all 21 rings are now known
</UL>
<LI><EM>Congratulations</EM>: This sample is crossdated by skeleton plotting
</UL>
</UL></TD>
<TD><IMG SRC="gettingdates.gif" WIDTH="335" HEIGHT="275" ALT="finding start and end dates"></TD></TR></TABLE><BR>
<TABLE>
<TR><TD><IMG SRC="showanswer.gif" WIDTH="58" HEIGHT="96" ALT="show or hide answers">
<TD WIDTH="400">When <A HREF="SkeletonPlot18.htm">you try skeleton plotting for yourself</A>, you can check your answers:
<UL>
<LI>There will be a button to "Show or Hide Answers," as on the left
<LI>When you mouse click to show answers, a box of answers will appear, as on the right
<LI>If the sample had <A HREF="ringanomalies.htm">ring-growth anomalies</A>, then the answer will include dates of <A HREF="absentfalse.htm">absent/false rings</A> as well
</UL></TD>
<TD><IMG SRC="answers.gif" WIDTH="297" HEIGHT="121" ALT="start and end dates"></TD></TR></TABLE><BR>
</CENTER>
<HR>
<CENTER>
<A HREF="introcrossdate.htm">Introduction</A> |
<A HREF="applications.htm">Dendrochronology Applications</A> |
<A HREF="exampleapplication.htm">Crossdating Application</A> |
<A HREF="ringanomalies.htm">Ring-Growth Anomalies</A><BR>
<A HREF="sensitivitycomplacency.htm">Sensitivity-Complacency</A> |
<A HREF="plotting.htm">Skeleton Plotting</A> |
<A HREF="relativescale.htm">Relative Scale</A> |
<A HREF="masterchronology.htm">Master Chronology</A><BR>
<A HREF="patternmatching.htm">Pattern Matching</A> |
<A HREF="findingdates.htm">Finding the Dates</A> |
<A HREF="absentfalse.htm">Absent/False Rings</A> |
<A HREF="SkeletonPlot18.htm">Try Skeleton Plotting for Yourself!</A><BR>
<A HREF="http://www.ltrr.arizona.edu">Laboratory of Tree-Ring Research</A>
</CENTER>
<HR>
<ADDRESS>Paul R. Sheppard<BR>
Laboratory of Tree-Ring Research, The University of Arizona<BR>
Tucson, Arizona 85721 USA<BR>
office: (520) 621-6474, fax: (520) 621-8229<BR>
Comments to: <A HREF="mailto:[email protected]">[email protected]</A>
</ADDRESS><BR>
Copyright © 1998, Laboratory of Tree-Ring Research, The University of Arizona<BR>
Revised -- December, 1998<BR>
URL: <A HREF="findingdates.htm">http://tree.ltrr.arizona.edu/skeletonplot/findingdates.htm </A>
</BODY>
</HTML>